SMALL BLIND FISH. 901 



Eyes rndimentary, concealed nnder the ekin ; sniface of head crossed by vertical, 

 tactile lidges ; gill-membranes faJly joined to isthmns ; ventral fins present, qnite small, 

 close to anal; colorless fishes of small size, lohabiting the cave streams in the limestone 

 regions of the Western States. 



AMBLY0P3IS SPEL^DS DeKay. 



Liarger Blind Fish of the mammoth Cave. 



Amhlyopais spetwm, DbKay, New York Fauna, Fishes, 1842, 147. — Wyman, Amer. Jonm. 



Soi. Arts, 1843, 94; Ann. Mag. Nat. Hist., xii, 1843, 298; Proc. Bost. Soo. Nat. Hist., 



1850, 349, and elsewhere.^THOMPSON, Ann. Nat. Hist., 1844, 112. — Tellkampf, 



Miiller's Arch., 1844, 381. — Agassiz, Amer. Journ. Sci. Arts, 1851, 127. — Poet, Mem. 



Cuba, 104. — GuNTHER, Cat. Fish. Brit. Mns., vii, 1868, 2. — Putnam, Jordan, and of 



all writers generally. 



De8cripUon. — Colorless ; mouth comparatively large, the length of its cleft about equal 



to the base of dorsal ; pectorals reaching front of dorsal ; caudal long, rather pointed ', 



one pyloric cossum ; head 3 in length ; depth 4} ; D. 8 ; Y. 4. Length 5 inches. 



Habitat, subterranean streams of Kentucky and Indiana. Mammoth Cave, etc. 



Genus TYPHLICHTHYS. Girard. 



Typhlichthys, Girard, Proc. Acad. Nat. Sci. Phila., 1859, 62. 

 Amblyojaais, sp., Gunthkr. 

 Chologaattr, sp.. Gill. 



Type, Typhlichthys aubterraneus, Girard. ' 



Etymology, tuphloa, blind ; ickthus, fish. 



This genus may be known, by its blindness and by the abteice of the ventral fins. 



Typhlichthys subterkaneus Girard. 



Small-blind Fish. 



Typhlichthys suiterraneua, Girard, Proc. Acad. Nat. Sci. Phila., 1859, 62, and of Patnam^ 



Jordan, and late writers generally. 

 Amhlyopais -apelceua, variety without ventral fins, Gunther, 1. c. 



Description. — Colorless ; head rather blunter and broader forwards than in A, apelceua ; 

 mouth smaller, its cleft shorter than base of dorsal ; pectorals scarcely reaching dorsal ; 

 one pyloric coeoum ; D. 7 or 8; A. 7 or 8. Length, 2 inches. 



Habitat, subterranean streams of Kentucky, Tennessee, and Alabama. 



Genus CHOLOGASTEE. Agaasiz. 



Chologaster, Agassiz, Amer. Journ. Sci. Arts, xvi, 1853, 135. 



Type, Chologaater cornutua, Agassiz (from South Carolina). 



Etymology, eholos, deficient ; gaster, belly, (from the lack of ventral fins). 



This genus has the general characters of Amhlyopsia, but differs in the absence of ven- 

 tral 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 coeaa 2. 



