* -- 



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A to G, Photographs of the eyes of Amblyopsis ; H, eye of Troglichthys. 



A. Horizontal section of right eye of fish 9.5 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 I 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 1 05 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 eye. 



