EIGENMANN 



PLATE 9 



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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, 4 1 mm. long; E. Troglichthys rosae, 38 mm. long; 



C. Chologaster papilliferus, 35 mm. long; F. Amblyopsis spelasus, 35 mm. long. 



