io6 



BULLETIN OF THE BUREAU OF FISHERIES. 



Fig. 38.— Mature unfertilized egg. 



Fig. 39. — Egg with blastoderm of 2 cells. 



Fig. 40. — Egg with blastoderm of 16 cells. 



Fig. 41. — Egg showing early stage in the differentiation of the 

 embryo. 



Fl«. 43. — Egg with embryo well differentiated, blastopore, Fig. 43. — Egg with advanced embryo, 



closed. 



PRIONOTUS CAROLINUS. 



