Report U. S. B. F. 1904. 



Plate III. 



Fig. 1. 



Fig. 2. 



ey^. 



f 



Fig. 4. 



Fig. r>. 



HEADS OF CHOLOGASTER AGASSIZII (FIG. 1), C. PAPILLIFERUS (FIG. 2), TYPHLICHTHYS 

 SUBTERRANEUS (FIG. 3"), TROGLICHTHYS ROS/E f FIG. 4i, AND AMBLYOPSIS SPEL/EUS 

 (FIG. 5). 



Figures are intended t<i show tlie eye. They are pre|iiired liy photographing the upper portion 

 of lieads of fish about the same size that liad been eleared in xylol. The eye of Typhlichtliyx 

 has no pigment, hence does not show. 



