. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. D. Heads seen from above and showing the relative sizes of the eyes of: A. Zygonectes notatus; D. Typhlichthys subterraneus, about 35 mm. long; B. Chologaster agassizii, 41 mm. long; E. Troglichthys rosae, 38 mm. long; C. Chologaster papilliferus, 35 mm. long; F. Amblyopsis spelaeus, 35 mm. 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 ori


. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. D. Heads seen from above and showing the relative sizes of the eyes of: A. Zygonectes notatus; D. Typhlichthys subterraneus, about 35 mm. long; B. Chologaster agassizii, 41 mm. long; E. Troglichthys rosae, 38 mm. long; C. Chologaster papilliferus, 35 mm. long; F. Amblyopsis spelaeus, 35 mm. 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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