20 FISHES OF TEXAS. 



H. — RIO COLORADO, AT AUSTIN, TEXAS. 



M 



The Colorado Eiver at Austin, Tex., is a broad, rather swift, cle 

 stream, flowing over a bottom of gravel and rocks, occasionally mud( 

 in places where there is no current. Above Austin, a little over a m: 

 on the west side of the river, Spring Creek flows into the Colorad 

 This is a very clear, cold, limestone stream, fed in summer, in large pa: 

 by the waters of Barton Spring. This spring is a round cavity soi 

 50 feet across and 8 to 10 feet deep, from which flows a strong curre 

 of pure cold water. The spring is full of water plants, and is the aboi 

 of Eels, Gamhtisia, and the Catfishes. 



We seined very carefully and successfully the spring, the creek, ai 

 the river. Large numbers of individuals were obtained, but only 

 small number of species. The fact is, apparently, that only a sm; 

 number of species actually inhabit the river. The Colorado Eiver 

 larger than the Washita or the White Eiver, Indiana. It is a strea 

 of similar character in many respects to these, and it was more the 

 oughly explored than the Washita. Our records show 75 species in t 

 White Eiver (results of repeated work), 47 species in the Washita (i 

 suits of the work of a single morning), and 25 in the Colorado. 



1. Ictaluius punctatus Rafinesque. 



2. Amiurus nebulosus catulus Girard. 

 In Barton Spring. 



3. Leptops olivaris Rafinesque. 



4. Ictiobus carpio Rafinesque. 



Numerous specimens, apparently specifically identical with Northe 

 specimens which we have called by this name, but ratlier more elonga 

 than any of these, and rather more brassy in color. 



Head short, 4 in length ; depth, 3^^. Eye rather small, 4.^ in hea 

 ^nout projecting little beyond the mouth, its length a little more th; 

 that of eye. Opercle very strongly striate. Longest ray of dorsal n 

 quite reaching to the middle of the fin when depressed ; anterior ra 

 little thickened, D. 32. Scales, 7-40-5. Bodj^ subfusiform, the ba( 

 comi)ressed, little arched. 



5. Ictiobus velifer Rafinesque {tumidus). 



6. Moxostoma congestum Baird & Girard. 



7. Campostoma anomaluni Rafinesque. 



8. Pimephales notatus Rafinesque. 



9. eiiola vigilax Baird & Girard. 



10. Notropis lutrensis Baird & Girard- 



11. Notropis venustus Girard. 

 Abundant. 



12. Notropis notatus Girard. 



A few small specimens, which we refer to this species. They ha 

 the caudal spot faint, overlaid by the scales, and but 34 scales in tl 



