lOO 



CHIM^ROID FISHES AND THEIR DEVELOPMENT. 



THE RELATION OF THE BLASTODERM AND YOLK AT THIS STAGE. 



As alreadj' noted (p. 58), the egg of Chimsera has by this time undergone a 

 process of fragmentation. The bulk of the egg subdivides in the direction of pro- 

 ducing for the embryo nutriment to be appropriated via gills and gut; a single mass 



Figs 76 A-N. — Transverse sections of the embryo shown in plate VII, fig. 44. 

 T't, Mandibular head cavity ; p'tl, premandibular head cavity. 



