392 REPORT OF THE COMMISSIONER OF FISHERIES. 
Typhlichthys subterraneus Garman, Bull. Mus. Com. Zool., XVII, 1889, 232 (wells 
and caves, Jasper County, Missouri); not of Girard. Kohl, Rudimentiire 
Wirbelthieraugen, 1892, 59. 
Typhlichthys rose Eigenmann, Proc. Ind. Ac. Sci., 1897 (1898), 231, Sarcoxie, Mo. 
Troglicthys rose, Eigenmann, Science, N. §., IX, 1899, 280 (Day’s Cave, Sarcoxie, 
Missouri); Degeneration in the Eyes of the Amblyopside, its Plans, Processes 
and Causes, Proc. Ind. Ac. Sci., 1898 (1899), 239 (summary); Eyes of the Blind 
Vertebrates of N. A., Archiv. f. Entwickelungsmech., VIII, 1899, 573; A Case 
of Convergence, Proc. Ind. Ac. Sci., 1898 (1899), 247. 
AMBLYOPSIS De Kay. 
Amblyopsis De Kay, Nat. Hist. N. Y., Reptiles and Fishes, 187, 1842 (speleus). 
Unlike the other genera of this family, Amblyopsis possesses ventral 
fins. The eyes are concealed under the skin and are not at all fune- 
tional. The head as well as the body is furnished with regularly 
arranged rows of tactile papille. Pyloric cceca generally 2, but some- 
times 3. 
Amblyopsis spelzus De Kay. Plate VI. 
The body of Amb/yopsis is heavier than the other members of this 
family; depth in length, 4 to 5; head, 3, depressed like that of Zyph- 
lichthys; youth not so obliquely set as in the other members of the 
family; premaxillary not protractile; eye just visible through the skin 
in the young, not visible in the adult; gill-cavities enlarged, probably 
on account of the breeding habits of Amblyopsis”, pectoral contained 
1.7 in head; anal rounded, with 8 to 10 rays; dorsal, with 8 to 10 rays, 
inserted slightly in front of anal, similar to it in shape. The variation 
of the rays in these 2 fins depends on the short rays at the front of 
each. These are very small and are covered by the fat skin, so as not 
to be seen from an external examination. Caudal fin broad, slightly 
pointed at tip; ventrals very small, inserted so that their posterior 
margins reach front of anal, rays about 4 in each fin. Fatty enlarge 
ments present at bases of all the fins, but more especially the dorsal, 
anal, and ventral; pyloric ceca 2 to 8; scales small and arranged 
irregularly, similar to those of Chologaster. Body colorless. In lite 
the coloy is a rosy, purplish hue, due to the blood vessels which show 
through the skin; alcoholic and formalin specimens, yellowish white; 
no evidence of pigment anywhere on the surface. Length, 5 inches. 
This species is known south of the Ohio River from Mammoth Cave 
and its vicinity only. North of the Ohio it has been found in a num- 
ber of caves from Little Wyandotte, near the Ohio, to Hamers and 
Donnelsons caves, near the East Fork of the White River. It has 
become very rare in and about Mammoth Cave. ‘The specimens exam- 
ined were one from Mammoth Cave, a large number from Donnelsons 
Cave, and one from Hamers Cave. 
«Figenmann, Marine Biological Lectures, 1900, for 1899, 113. 
