. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. 116 BLIND VERTEBRATES AND THELR EYES. CHOLOCASTER ACASSIZII. Only a single specimen of this species appears to have been put on record. Putnam described it from Lebanon, Tenn. The present account is based on five specimens secured by me in the river Styx in Mammoth Cave and in Cedar Sinks. The eye of Chologaster agassizii Putnam is much smaller than that of C. papilliferus. In a specimen 41 mm. long it is placed mm. from tip of the snout, the eye measuring mm. in diameter. The distance from e
. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. 116 BLIND VERTEBRATES AND THELR EYES. CHOLOCASTER ACASSIZII. Only a single specimen of this species appears to have been put on record. Putnam described it from Lebanon, Tenn. The present account is based on five specimens secured by me in the river Styx in Mammoth Cave and in Cedar Sinks. The eye of Chologaster agassizii Putnam is much smaller than that of C. papilliferus. In a specimen 41 mm. long it is placed mm. from tip of the snout, the eye measuring mm. in diameter. The distance from eye to eye is mm. It is elliptical in outline, with the lateral face depressed. It is directed outward. The optic nerve, which, at its origin, is surrounded by pigment for a distance of mm., extends almost straight inward. The dermis over the eye is essentially as in papilliferus. The epidermis is less simplified. It is thinner than in the surrounding tissue, but goblet cells are found in it, although they are much )»g| ecru 5»i mm Jo° 0 G^^boo, 0O0. msfC-^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Eigenmann, Carl H. , 1863-1927. Washington, D. C. , Carnegie Institution of Washington
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