EMBRYOLOGY AND UARVAIv DEVELOPMENT OF TELEOSTEAN FISHES. 95 



Fig. 7. — Egg showing advanced stage in differentiation of 

 embryonic axis. EA.embryonicaxis; EES, extra-embryonic 

 area of embryonic shield; GR, genn ring; PP, posterior pole 

 of blastoderm. 



SET-N. «^ 



-^P 



Fig. 8. — Same as figure 7. lateral view. 



Fig. 9. — Egg with advanced embryo, with 8 somites. Fig. 10.— Egg with advanced embryo, shortly before katcliing. 



Fig. II.— Newly hatched fish, actual length 2.1 mm. 

 TAUTOGA ONITIS. 



