TPWD 1954 F-7-R-2 #22: Basic Survey of and Inventory of Species of Fishes Present in, and their Distribution in, the Canadian River in Texas

STATE sTenas ERDJECT ND. F-TeR-E Jobs.a-l and 3-5 PERIOD June 1 l E — an 31 1 J63 COHPLETIQH REPUHT Leo D. Lewis and Halter W. Dalquest TITLE: Basic survey of and inventory of species of fishes present in, and their dis- tribution in, the Canadian River in Texas, including_the following counties: Hartley, Oldham, Potter, Moore, Carson, Hutchinson, Roberts, Hemphill and Lipscoab. OBJECTIVES: 1. To gather fundamental data on the above waters in regard to their physical, chemical and biological aspects. 2. To determine the distribution of the species of fishes present and their relative abundance, and the ecological factors influencing their distribution. ”TECHNIQUES: Basic survey work was done by following the river banks as closely as possible, by car, h-wheel-drive jeep, or walking, taking samples of the fish populations of the river at scattered points, of every tributary stream that contained water at the time of our visits, and of every impoundment of the tributary streams. The samples of fishes and water were analysed in the laboratory. Other fundamental data wasecbtained from the acknowledged sources. The inventory of species was based on monthly samples of fishes and water from five stations established along the length of the Canadian River in the State of Tense. 0a a few occasions, data could not be'dbtainad free someflststionafidue=to pollution, freezing conditions that prevented seining, or lack of water in the river. BACKEEBUND: The arid'Tenas Panhandle contains a large number of enthusiastic fishermen but almost no appreciable amounts of water suitable for game fishes, In consequence, the lake to-be shtablished at the site of the proposed Sanford Reservoir assumes increased importance from the standpoint of fisheries management in Texas. Previous to the present investigations very little was known of the aquatic biology of the Tense Panhandle. Because the Tunas Game and Fish Commission will doubtless be called upon to stock the new lake, when established, with game fishes and perhaps also to manage the sports fisheries, we desired to know: (1) present utilisation of the Canadian River in Texas for sports fishing; (2) species of fishes present in the river or ascending the river from downstream as migrants (especially rough fish species that might prove problems in the new'lake); (3) populations of game and rough.fishes in the tributary streams and tributary stream impoundments that might later reach the new lake as a result of floods, etc ; (h) the chemical nature of the water of the river and its tributaries. Equally important was the detailed study of the industrial pollution of the Canadian River. This has been reported elsewhere (see Completion Report, FeT—Rue, Jab C-l, part 1). In all of our investigations of the Canadian River we have kept in mind the relation- ship of the data obtained to the proposed Sanford Reservoir. The importance of the pro» posed lake is suggested by the fact that 153,000 fishing permits are sold each.year at Buffalo Lake, the nearest moderately large lake and much smaller than the proposed new lake. The United States Fish and Wildlife Service estimates (a Detailed Report on the Fish and Wildlife Resources for Sanford Reservoir, Canadian River ProJect, Canadian River, Texas, May, 195%, page 7, made available to us through the kindness of Mr. Karl Robes, U. S. Fish and Wildlife Service, Amarillo, Texas) not less than 200,000 fisherman days per year for the new lake, and a value of 730,000 dollars for the sports fisheries resource. The paucity of previous information about the aquatic biology of the Texas Panhandle is emphasised by the fact that two of the common species of fishes living in the Canadian River had never previously been reported as occurring in the state. ACKNOWLEDGMENTS: We were able to make a moderately thorough basic survey of the Canadian River only because the game wardens of the area served as guides in the more inaccessible areas, giving freely of their time and experience, and sometimes spending days in the field with us. we wish to acknowledge our indebtedness to game wardens P. D. Mosley of Canadian, Starkey'Whitehorn of Borger, Lake Black of Amarillo, Cal Lovelace of Pegs, and game warden supervisor Jim.Maggard of Amarillo. Dr. Carl.Gray, Soils Scientist of Midwestern Uhiversity,'flichita Falls, and the Wichita County Water Improvement Districts, made the many detailed water analyses. Data on water volume were obtained from Mr. John Joerns, United States Geological Survey, Water.Resources Branch, Wichita Falls. Other data was obtained from various published and private sources, and by field work. BASIC SURVEY UF‘TEE CANADIAN RIVER WhTERSEEDi The Canadian River originates in the Sangre de Christo Mountains of Raw Hexico. One large lake, Conchas Reservoir, is located on the Canadian River in Hew'hexico. We note with apprehension that gissard shad, European carp and buffalo fishes oc_.cur in Conchas Reservoir, and that a flood might wash these undesirable forms intd Sanford Reservoir. The river crosses- the northern part of the Texas Panhandle, entering Texas from New Mexico in Cldham County and trending easterly or eastenortheasterly to. the Cklahhma- boundary in Hemphill County. There are no major br-a-nches or tributaries. of the river in Texas. To the east the Canadian River continues through Cklahoma to the eastern part of the state where it .Joins the Arkansas River. The combined waters enter the Mississippi in eastern Arkansas. The Texas Panhandle crossed by the Canadian River belongs ecologically to the Short Grass Plains Biotic District of the Prairie Province. It is an area of sandy soil and rolling, grass—covered hills, generally called the High Plains. These grassy uplands are mostly of Pliocene age, the 0gallala Formation, of soft sandstones, sand deposits,eto. The Canadian River has cut a valley about thirty miles broad through.the High Plains, and about 900 feet deep. 0n the west the river has cut through the salt Pliocene rocks, exposing the harder Triasic rocks of the Dockum Group from the New Mexico boundary through Cldham and Potter counties. From Potter County to the Cklahoma boundary the river valley exposes Parmian sediments, largely the Quartermaster Formation, with, easterly, some Cloud Chief Formation, both of the Double Hhuntain Group. The river bed itself is of Quaternary sands, probably derived in large part from the 0gallala sandstones. The Canadian River is a braided stream with a sandy flood plain varying locally from less than 1,000 feet in width to more than 3,000 feet. Although the drainage area is considerable (l9,hh5 square miles at Amarillo Station; 22,703 sq. mi. at Canadian Station), water flow is highly irregular. In times of heavy rain, the river becomes a raging torrent. Highest estimated discharge was 257,000 cubic feet per second. many times, and over much of its length, there was no surface flow of water during the past project year. Where there was a surface flow, it was highly unpredictable. Harrow, shifting channels of shallow water might slide sidewise unexpectedly or vanish undera ground several times during the day. The surface flow might be in one part of the stream had during the morning, in another part at noon, and in still another place at nightfall. As a result} fishes occur only in the most permanent channels and pools. Much of our collecting was done in pools excavated by the current at the bases of bridge supports. Sometimes we were seining in one part of the river bed while the high winds, charaeteristic of the region, made the rest of the river bed a raging sandstorm. In spite of the erratic habits of the Canadian'River water, fishes characteristic of the Arkansas River drainage were found at all stations except when the river was dry or polluted by industrial waste.’ Black bass were taken only in a deep pool near the 0klahoma boundary but channel catfish, black bullhead catfish and green sunfish were taken almost throughout the length of the river. All specimens taken, however, were too small to have attracted fishermen. ' Tributary streams, especially of the western part of the river, have braided beds and steep gradients. The streams are usually shallow but fishes are common. The commoner species are shiners, minnows and killifish. Farther east a few streams are larger and have deeper'beds. Game fishes occur in these streams. Impoundments of tributary streams form many beautiful small lakes where black bass, sunfishes and other game forms are common. Rough fish species are conspicuous by their absence.- Water quality of the river and the tributaries is good. Exception is made of those tributaries carrying industrial waste and of a small pool near Borger where, for reasons not apparent, the water is exm tremely salty. In the course of our basic survey of the Canadian.River, data was obtained from several points along the river in addition to the established stations that were worked each month. Data was also obtained from numerous tributary streams and the impoundments of tributary streams. In the following paragraphs, sample localities are lised from west to east. The number assigned to each paragraph forms the code for the water sample analyses in'Thble l. 1. River, five miles east of the New Mexico boundary; September ll, lQSb. This locality is on the matador Ranch. The river bed is sandy with scattered rocks. There are some deep holes. Seining took: SB'Notropis girardi 159 Hybognathus lacita (#6 mature, 113 fry) 20 Eybopsis gracil a (up to 7 inches in length) l Eyhopsis aestivalus 23 Fundulus kansae 2 Ictalurus unctatus {3 and b inches in length) l Ameiurus melas i7 inches in length) 2. slameeitas Creek, Uldham Ceunty, entering riwer en seuth side. September l, lgfih. a relatively deep, elear ereek with numereus heles. we seined and caught: 92 Netrenis lutrensis 287 PImeEHEIes Eansae 1&2 Fundulus kansae l3 Ameiurg§_melas (all less than 3 inches in length) 13 Efihemls exaneIlus {up tn 6 inches in length) 3. River, due nerth ef Adrian, at eld farm eamp ef matader Raneh, Oldham Ceunty, September 11, 195h. The river is enly'mederately wide. There are same few reehs and peels in the stream bed, whieh is braided sand. Fish were net abundant and we teak: 11h fietrepis girerdi 135 Egbeggathus plaeita h. Bays Raneh Creek, Oldham Cennty, July'29, 195h. water sample taken January 13, 1955. A small, eeld, elesr stream that enters the river en the nerth side, at Taseesa. The ereek flaws threugh a weeded esnyen with many shellew riffles and small peels. Seining teek: 3 Fundnlus kansae #9 Gamhesia sffinis Bays Raneh.1ake. e.small impeundment en Bays Raneh Creek. we did net seine here but neted bluegill sunfish and blank bass taken by fishermen. 5. Piteher Creek, Fetter Geunty, July 28, lQSh. A small, elear, eeld, springafed ereeh that enters the riwer en the nerth side, just west ef Amarille Statien. The gradient is steep but the heawy'burden ef sand braids the ehannel until there are ne peels, and the water ferms a narrew rill a few feet wide and net mere than three inehes deep, threugh the sand. Seining teek enly: 1h Fundulus kansae 6. Amarille Greek, Patter Ceunty, August 10, lgfih. This large stream is the sewage effluent ef the eity ef Amarille. It enters the river en the seuth side just west ef Amarille Statien. The water is green with algae. 'We did net seine. T. Berger Spring Peel and Greek, Hutshinsen Ceunty, August 11, 195h. This is a small peel, aheut 25 feet in diameter, with a small stream leading tn the riser, en the nerth side just east ef Berger Bridge Statien. The peel eentains wast numbers ef mesquite fish and killifish. Our first water sample shewed sueh a high eeneentratien sf salt that we test anether sample en September 8, and still anether en Jannary ll, 1955. Bur seine sample, taken September 8, lyfih. eentained: 2,eee Gsmbusia affinis (estimated) 9 Fundulus kansae 3. Bent Creek, Hutehinsen Ceunty, July 1h, 195%. a small, narrew ereeh fleeing threugh a grassy meadew ever a sand and gravel bettem te enter the river en the nerth side. e.seine haul teek enly hillifish: 13 Fundulus kansae. Bent Creek Lake. a lake ef abeut #0 aeres leeated en Bent Creek a shert distanee frem the river. Large sunfish and hlaeh'bass are abundant here. Seme ef the sunfish taken in ear seine haul were tee big te pass the menth.ef eur sample battles and were released. The sample sawed eentained: l Gambusia affinis T Hicrepterus salmeides (1 inch in length) 3 Lepemis macrechirus (up te : peund) 6 Lepemis misrelephus (up te peund) 9. Adebe creek, Hutchinsen Ceunty, July 1%, l95h. A small creek that was dry'at the time ef'eur visit. a dam farmed a pend cf abeut twe acres in the bed ef the stream but drenght'had greatly reduced its welume. we seined in the remaining water and tech: h'fletemigeneus cr seleucas 16—Ameiurus melas iaweraging ene inch in length) l Fundulus kansae 17.Hicrepterus salmeides '(aweraging ene inch in length) 23 Lepemis cggnellus El te h inches in length) 10. Spring Creek, Hutchinsen Ceunty, July 28, 195h. A small, clear, swift stream with braided bed, entering the seuth side cf the river aheut five miles west cf White Deer Creek. we seined but tech enly hillifish: 38'thdhlus kansae 11. white Deer Creek, Hutchinsen Cennty, July 25, 1951:. A large, slew moderately deep creek with usually sandy'bed but with numereus large peels. In the shallews we feund enly killifish but in the deeper peels we tech: 13 Hbtrepis deliciesus 202 Hbtrepes lutrensis 95.Pimephgles remelas lfl smeiurus melas iup te % peund) ET'Lepemis cmellus (1 tn 3 inches in length) in Lep'emis megaletis (1 “be 3 inches in length) 12. River, at Brainard's Ranch, Hutchinsen Ceunty, July it, 195h. The pellutien free the refineries at Berger reaches this far dewnstream fer we smelled the mercaptans in deeper peels in mideehannel, and these peels centained ne fish. Peels alcng the base ef a cutbank, at slightly higher elevatien than the midechanuel peels, held: 109 "Eetrepis girardi 2 Hetrepis lutrensis 22 e nathus placita 2 Fun ulus kansae le'dambusia affinis 13. Patis dreeh, Heberts-Ceunty, July it, 195%. A smell creek en the nerth side ef the river, flewing frem peel te peel threugh masses cf'bullrush. The peels are deep, mud-bettemed and weedefilled, but the shallews between the peels are white sand. we retenened a small peel and saved as a sample: h emeiurus males 8 Fundulus kansae 22 Gembusia affinis l Hicrepterus salmeides (h inches in length) 1% Lepemis cEEnellus E2 tn 5 inches in length) 1h. Jehn's Creek, Reberts Ceunty, July it, 195h. A larger creek that enters the riser en the nerth side. The creek eccupies a bread, sandy valley and censists efnumereus 6. deep peels and sandy interpeel shallews. we saw ene large black.bass here, and cur seines teak: I 2h threpis lutrensis l2 Netrepis deliciesus 387 Pimephales premelas l2 Gambusia affinis 53 Fundulus kansae l Lepemis clanellus 15. River, at meuth cf Lake Creek, Heberts Cennty, Jn13_1h, 195k. The bed cf the creek is drp'but in peels in frent cf the dry creek meuth, in the river, we seined and tech: l Netrepis lutrensis 23 Netrepig girardi 17 sgtggggtnne placita 61 Gembusia affinis l dmeiurus melas (t inches in length) 16. Hergan Creek, Heberts Ceunty, July 1t, l95h. This is,a small creek en the nerth side ef the river, dry at the time cf cur visit. .A dam ferms a small peel in the stream bed and this was seined: IT:HicrepEerus salmeides (seeraging abeut 1 inch in length) 25 LeEemis cxflnellus 31 ta 5 inches in length) 17. River, at meuth cf hergan Creek, Heberts Ceunty, July 1h, l95h. e narrew, deep peel in the river bed centained a vast number cf small fish. One seine drag filled cur sample Jar and we had te threw many specimens back. Our sample included: 26% gxbggnathns plaeita 21'Netrepis girardi t6 Hfipepsis gracilis (up te T inches in length l'ggbepsis aestivalua " 18. Chicken Creek, Heberts Ceunty, July 15, l95h. A small creek that enters the river frem the seuth. It is said te ardinarily run threugheut the year but at the time cf cur visit it was almest dry; A few small peels that remained in the stream had were seined, resulting in a catch ef: 2 Pimephales premelas 19'Fundulus kansae 9 Lepemis eianellus l9. Herse Creek, Hemphill Ceunty, July 1h, 195%. This crash is small but has same surprisingly large, deep heles. Seme cf these were estimated at 20 feet wide and deeper than a man"s head. It enters the river frem the nerth, a few miles west ef the tewn cf Canadian. Our seine sample included: 37 Pimephales premelas 6.Ameiurus melas #7 Fundulus kansae l Mierepterus salmeides 20. Baggy Creek, Hemphill Ueuntg, July 13, lgfih. A narrew, deep, rather sluggish creek cf brewnish water flewing in a narrew, rather steepewalled canyen. we seined a wide peel where the water was chestedeep and tank: h Hetemigcneus chgeleucas 15 dmeiurus males (2 te h inches in leggth) 5 Gembusia affinis 1.Micreptsrus salmeides (6 inches in length) 13 Lepemis c nsllus E1 tn 3 inches in length) 56 Lepemis macrechirus (1 te h inches in length) 21. Clear Creek, Esmphill Ceuntp, July 13, lgfih. .h narrew, sluggish, cattail- lined stream in a steep, narrew valley; He seined a small lake in the stream valley and teek several hundred green sunfishes and black bullhsads. dbeut twenty-fits ef the bullheads averaged ens—half peund in weight but meet were enly a few inches leng. Cur sample includEdi 1 fibtrepis lutrsnsis E'flfitrepis deliciesus 25Ksmsiurus mslas (less than 3 inches in length) #3 Lspemis elgneiine (less than 3 inches in length) 3'Lspemis mierelephus {aheut 3 inches in length) l Chsenebpzptus cerenarius (3 inches in length) Lake Martin, Hemphill Ceunty. A public fishing lake, under U. d.'Fish and Wild- life Ssrwics centrel. Black bass and bluegill sunfish are abundant. Channel catfish are else said te be present but we saw'nene. n fish census was net made here. Lake en Big Bull Ranch, Esmphill Ceunty. .A.mederatsly large lake, abeut enee half the sins cf Lake Martin, centaining black.bass, bluegill sunfish, green sunfish, and sees large channel catfish. we examined a channel catfish cf abeut feur peunds weight taksn'by a fisherman. n cemplste fish census was net made here. 22. River at Deep Eels, Hemphill Ceunty, July 13, 195%. A deep hele in the sandy river bed, pew enly 20 feet wide, t0 feet lung and sin feet deep. A.fsw years age this hele was fermsd'by a whirlpeel at time cf high water cm a bleweut in the sandy river bed. Three years age it is said te have been ever 10C feet leng, he feet wide, and 20 feet deep. Black bass up te three peunds in weight have been taken here. Our seine drags tech: 3 Retsmigensus criseleucas 5 Gambusis affinis 31Micreptsrus salmeidss (h te 7 inches in length) l I-epemis cEnellus l Lepemis macrechirus 28 Lspgmis micrclcphus 23. River, at Cklahema beundary, in Hemphill Ceunty, Texas, July 13, 195h. Here the river bed has a shale wall en the nerth side. ”The shale is seft and where the river strikes it, a small, deep, narrew peel has ereded inte the shale. The river bed seems mere muddy here than farther west. Our seines teck: h Hhtrepis lutrsnsis STmflbtrepis girardi Edd—gflbpgppthus placita 11 Egpepsis gpacilis h Gambusia affinis l Fundulus kansae l Lepemis cxpnsllus 3 Lepemis macrechirus TABLE I. WETER AHAEESES ET SAMPEE LDCALITIES 1. 9/11/5# 2#6 637 1092 268 15 19# 2,#52 8.78 2. 9/11/5# 62 36 21 35 9 188 351 8.#8 3. 9/11/5# 136 201 251 2#1 12 186 1,027 8.79 #. '7/29/5# 90 18 5 5 - 295 #13 8.#0 5. '7/28/5# 60 7 5 9 - 159 251 8.10 6. 8/10/5# 118 17# 15# 71 nene #68 985 7.60 1/12/55 18# 120 99 105 nene 580 1,088 7.91 7. 8/11/5# 5##7 3636 13685 1##6 — 903 25,117 6.85 9/8/5# 5352 3825 #62 791 6 60 2#,811 7.92 1/11/55 #712 3621 12816 1#32 nens 122 22,703 7.55 8. '7/1#/5# 100 23 #7 23 21 21# #29 8.20 9. 7/1#/5# 81 63 90 8# 17 116 #51 8.60 10. 7/28/5# 63 15 31 18 - 12# 267 8.23 11. 7/28/5# 52 33 3# 6 - 1#3 287 8.30 12. 7/1#/5# 87 18 #1 #0 11 171 368 8.30 13. 7/1#/5# 130 23 #5 80 11 257 5#6 8.15 1#. 7/1#/5# 86 2 22 39 6 168 323 8.25 15. 7/1#/5# 85 25 #8 3# 30 1#2 36# 8.#5 16. 7/1#/5# 18# 15 280 #9 sens 58 586 7.75 17. 7/1#/5# 190 9 130 #1 17 17# 561 8.15 18. '7/1#/5# 195 66 2## 32 - 298 8## 8.00 19. 7/1#/5# 109 80 136 19 27 23# 605 8.50 20. 7/13/5# 65 10 5 10 21 165 276 8.#0 21 7/13/5# 80 50 #3 17 20 2#0 #50 8.00 22. 7/13/5# 151 #8 62 12 2# 231 #67 8.50 23.. 7/13/5# #2 nene 5 29 3 78 157 8.20 Nets: Humbers in leftehand celnmn refer te paragraph numbers en pages 3 te T. TABLE II. senses FLev'Dnrh.ch THE 02210112 Rives er 12121110 seerrps the 01212112 2212102 Fees 0020222 1, 1952 20 SEPTEMBER 30, 1953 E 2 i mean Dctebsr discharge 10.0 1.62 Esau Nevsmbsr discharge 11.0 1.97 Mean December discharge 13.1 36.2 Mean'January discharge 16.2 152.0 Hean'Fsbruary discharge 10.1 h7.8 Mean March discharge 10.6 26.7 Hean.spril discharge 10.0 1.5 mean Hay discharge 9.h 5.6 mean June discharge 9.0 121.0 seen July discharge 50#.0 903.0 mean.August discharge 788.0 1,028.0 Khan September discharge 31.2 .8 Mean annual discharge, 1952—1953 121 197 17 year average discharge 550 702 Tetal 0cteber runeff 616 100 Tetal'flevember runeff 65# 117 Tetal December runeff 805 2,220 Tetal January runeff 1,010 9,360 Tetal'Fehruary runeff 561 2,650 Tetal.Harch runcff 653 1,6h0 Tetal.hpril runeff 596 90 Teta1_th runeff 5 325 Tctal June runeff 537 7,220 Tetal July runeff 30,980 55,500 Tetal August runeff 28,670 63,220 Tetal September runeff 1,860 #6 Tetal annualiruneff 87,320 122,500 Nets: All discharge is measured in cubic feet per ascend: all runeff is measured in acre feet. INVENTORY 0F SPECIES: u Twe types ef specisseinventcriss were made: a general, tarsal inventery cf the species cf fishes in the Canadian River, its tributary streams and their impeundments, and a seasenal inventery ef the Canadian River enly. In regard 'be the latter, we wished te determine the seasenal distributien cf the fishes ef the river, and especially te discever if there was any marked migratien cf fishes upstream, frem 0klshema te Texas, in perieds ef high water, er dewnstrssm frem New.Mesice en fleed waters. Details cf the areal survey cf the watershed are given en pages 3 tn 7. It was quickly apparent that the ecclegical ccnditiens cf the Canadian River were an different frem these ef its tributary streams that beth.hs1d distinct fish faunas. The impeundments cf the tributaries held still different fish faunas, derived frem 10. artifical stecking ef game species. hajer differences in the faunas ef the river and its tributaries included the almest cemplete absence in tributaries ef Hbtrbpis girardi, Hybpgnathns placita and Eyhepsis stereriana theugh these three species are ameng the nest cemmen and characteristic ferms ef the river. In the tributaries we feund Netrepis lutrensis, Hetrepis deliciesus, Pimephales premslas and Fundulus kansae te be abundant, but these ferms were usually rare in the river. Even when present, we suspect they were washed inte the river by rains en the watersheds ef the tributaries. We were especially alert fer the presenee ef Eurepean carp, gissard shed and suckers. we feund ne evidence cf their presence naturally in the river, its “ tributaries er tributary-impeundments. If these ferms de migrate te Tease frem the Oklahems part ef the Canadian.River, er are washed dewnstrsam frem Cenchas Reserveir in Eew'Henice, such instances must be rare. The Canadian River is, at present, almest valueless fer game fishes. A.few black bass, bluegill sunfish and black'bullhead catfishes are taken by anglers in deeper heles in the river each year, but we deubt that the tetal number cf all species, cembined, will exceed 50 fish. .A few cf the larger and deeper tributaries centain black bass, sunfishes and cstfishes cf gecd sine and in fair numbers. Hewever, meet cf these impeundments are rather rsmete and are cempletely inclesed by large ranches. As a result, few persens fish in them. The larger impeundments cf tributary streams furnish.the best fishing fer game fishes at present. The numbers and the quality ef the black bass and ether species in the tributary-impeundments suggests that the game fish crep ef the prepesed Ssnferd Reserveir sheuld be excellent. Lecally there are cencentratiens ef large minnews in the Canadian River that sheuld be suitable her cemmercial bait ssining. Censidering the absence cf game fishes in the river, it is pessible that the.river cculd stand heavier minneweseining than it is getting at present. The fellewing is a generalised summary cf the distributien cf fishes in the Canadian River watershed. Netrepis'deliciesus.-= Cemmen in a few tributary streams. Absent frem the river. Netrepis girardi.- - Abundant in the river but absent frem tributaries. Netrepis lutrensis. em Abundant in tributary streams and impeundments. Bare in the river where prebably washed by fleeds fellewing rains. Hybpgnathns placita. ee Abundant threugheut the length cf the river in Texas. Absent frem tributary streams and impeundments. Hyhepsis ggacilis. ee Lecslly cemmen in the river. Absent frem tributary streams and impeundments. Hyhepsis aestivalis. we Bare in the river, where usually feund near the meuths ef tributary streams, but apparently absent frem the tributaries. Pimephales premelas.-e Cemmen te abundant in deeper tributary streams. In the river we feund this ferm enly near Tascesa, where it was abundant in peels after rains. It is prebably net a natural resident ef the river. Netemigeneus cgyseleucas.-n Uncemmen in the river. Mere cemmen in the deeper tributary streams and their impeundments.