lOO 



BUIvIvETIN OF THE BUREAU OF FISHERIES. 



Fig. i8. — Egg with blastoderm of 2 cells. 



Fig. 19.— Egg with blastoderm of 4 cells. 



Fig. 20.— Egg with blastoderm of 8 cells. 



Fig. 21. — Egg with blastoderm in advanced stage of cleavage 

 and periblast (PB) differentiated. 



Fig. 23. — Egg showing a moderately advanced stage in the 

 differentiation of the embryo. 



Fig. 23.— Egg showing advanced embryo. 



TAUTOGOtABRUS ADSPERSUS. 



