. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. EIGENMANN. id. c A to G, Photographs of the eyes of Ambfyopsis; H, eye of Troglichthys. A. Horizontal section of right eye of fish mm. long. B. Dorsal face of horizontal section of left eye of fish 25 mm. long. Optic nerve directed forward and inward. C. Cross-section of left eye of fish 1 00 mm. long. D. Anterior face of transverse section of left eye of fish 123 mm. long. E. Transverse section of left eye of fish 1 30 mm. long. No definite structures are distinguishable aside from scleral cartila
. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. EIGENMANN. id. c A to G, Photographs of the eyes of Ambfyopsis; H, eye of Troglichthys. A. Horizontal section of right eye of fish mm. long. B. Dorsal face of horizontal section of left eye of fish 25 mm. long. Optic nerve directed forward and inward. C. Cross-section of left eye of fish 1 00 mm. long. D. Anterior face of transverse section of left eye of fish 123 mm. long. E. Transverse section of left eye of fish 1 30 mm. long. No definite structures are distinguishable aside from scleral cartilage. F. Transverse section of right eye of fish from which E was taken. G. Cross-section of right eye of fish 105 mm. long, showing large vesicle formed by pigment epithelium and remainder of retina as small nodule on its distal face. H. Eye of Troglichthys rosae showing large scleral cartilages and different layers of the 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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