CYPRINODONTID, — XXXVII. 83 
a. Eyes rudimentary, concealed under the skin; body colorless; one pyloric 
cegcum. 
6, Ventrals present, small. . . . . . » « + + « AMBLYOPSIS, 85. 
66. Ventrals entirely wanting. . + + © 6 « + TYPHLICHTHYS, 86. 
aa. Eyes well developed; body colored; no ventrals; two pyloric ceca. 
CHOLOGASTER, 87. 
85. AMBLYOPSIS DeKay. (duPrvs, obtuse; dys, vision. 
196. A. spelzeus DeKay. Buinp Fisu or tHe MammotTu 
Cave. Head 3; depth 44; D. and A. equal, well developed; head 
and body with papillary ridges; scales small; colorless. D.10. <A. 
9. V.4. P. 11. L. 2 to 5. Subterranean streams of Ky. and 
Ind., Mammoth Cave, etc. (Lat., living in caves.) 
“If the Amblyopses be not alarmed, they come to the surface to feed, and 
swim in full sight, like white aquatic ghosts. They are then easily taken by 
the hand or net if perfect silence be preserved, for they are unconscious of the 
presence of an enemy except through the sense of hearing. This sense is 
however very acute; for at any noise, they turn suddenly and hide beneath 
stones at the bottom. They take much of their food near the surface, as the 
life of the depths is apparently very sparse. This habit is rendered very easy 
by the structure of the fish, for the mouth is directed upwards, and the head 
is very flat above, thus allowing the mouth to be at the surface.’ (Cope.) 
86. TYPHLICHTHYS Girard. (rupdés, blind; ixAis, fish.) 
197, T. subterraneus Girard. General character of <A. 
speleus, but the head rather blunter and broader forwards; the 
mouth smaller. D.8. A.8. P.12. L. 2. Caves and wells in Ky., 
Tenn., Ala.; as common as the preceding, of which it is perhaps a 
variation. 
87. CHOLOGASTER Agassiz. (xyoAds, maimed; yaornp, belly.) 
198. C. agassizii Putnam. Eyes large; uniform light brown; 
fins speckled. P. a little more than half way to D. Head 4; 
depth 4. D.9. A. 9 L. 14. Subterranean streams in Tenn. 
and Ky. A closely related species (C. cornutus Ag.), is known 
from a rice-ditch in S. C. (For Louis Agassiz.) 
199. C. papilliferus Forbes. Yellowish brown, dark above; 
sides with three dark streaks, the middle streak pale behind head; 
C. dark, with cross-rows of white specks ; eye small, 6 in head, 
above and well behind maxillary; P. reaching half way to D.; body 
with tactile papillary ridges. Head 34. L.1inch. Cave spring, 
Union Co., Ill. (Lat., bearing papille.) 
Famity XXXVII. CYPRINODONTIDA. (THe Kuu1- 
FISHES.) 
Body oblong, depressed in front, more or less compressed be- 
hind, covered with adherent cycloid scales; no lateral line; head 
scaly; mouth small, terminal, extremely protractile; the edge of 
