FIGS. 1-3. STAGES IN THE DEVELOPMENT OF A 



DOG-FISH (after Bashfovd Dean), fig. 4. the 

 YOUNG GYMNARCHUs {after Budgett). 



In all these the young and growing fish derives its nourishment 

 from, an enormous store of yolk attached to the upder surface of 

 the body, and serving as an anchor. No food is taken in by the 

 mouth till all the yolk has been absorbed. 



208] 



