48. AMBLYOPSID^l CHOLOGASTER. 325 



fins. The species are of smaller size, and are found in the same waters. 

 (TO^O?, blind ; tyOu^, fish.) 



521. T. subtcrranvus Grd. 



Colorless. Head rather blunter and broader forwards than in A. 

 spelccus. Mouth smaller, its cleft shorter than base of dorsal. Pecto- 

 rals scarcely reaching dorsal. One pyloric coscum. D. 7 or 8; A. 7 

 or 8. L. 2 inches. Subterranean streams of Kentucky, Tennessee, and 

 Alabama. 



(Girard, Proc. Acad. Nat. Sci. Phila. 1859, 62; Putnam, Amer. Nat. 1872, 30, fig.) 



155. CHOLOGASTER Agassiz. 

 (Agassiz, Amer. Journ. Sci. Arts, xvi, 135, 1853: type Chologaster cornutus Ag.) 



This genus has the general characters of Amblyopsis, but differs in 

 the absence of ventral fins and in the fully developed condition of the 

 eyes, which are small and lateral. The species are not pellucid, but 

 colored like ordinary fishes. No papillary ridges. Pyloric coeca 2. 

 Ditches and cave-streams, (^tu/lo?, maimed ; Y affr ^Pt belly; in allusion 

 to the abortive ventrals.) 



522. C. coriiuf us Ag. 



Yellowish brown, dark above; sides with three dark longitudinal 

 stripes, becoming dots on the tail ; middle rays of caudal fin dark ; 

 fins otherwise uncolored. Mouth moderate, oblique, the maxillary not 

 extending to the eye. Pectorals reaching nearly to front of dorsal, 

 perfect, small. Snout with two horn -like projections. Head 3^-; depth 

 4. D. 8 or 9 ; A. 8 or 9. L. 2 inches. Ditches in a rice-field, Wacca- 

 maw, S. C. (Putnam.) 



(Agassiz, Amer. Journ. Sci. Arts, 1853, 135; Giinther, vii, 2; Putnam, Amc?. Nat. 

 1872, 30.) 



523. C. agassazi Putnam. 



Uniform light brown; fins somewhat speckled. Head 4 in body, its 

 length scarcely greater than the greatest depth. Pectorals reaching 

 little more than half way to front of dorsal. D. 9; A. -9. L. 1| inches. 

 (Putnam.} Subterranean streams in Tennessee and Kentucky. 



(Putnam, Amer. Nat. 1872, 30, fig.) 



A specimen of Chologaster obtained by Prof. S. A. Forbes in a cave- 

 stream of Southern Illinois does not agree well with either of the above 

 species. The following description has been furnished us by Professor 

 Forbes : 



The head is 7- mm long, and the body, without head or tail, 19 mm . Head iu length, 

 therefore, 3^ times. The eye is above and well behind the maxillary, and goes about 



