338 



W. E. HOY, JR. 



the normal somatic number, and since the chromosome pairs 

 are evidently doubled, it is highly probable that, as he suggests, 

 there was no division of the cell after the division of the chromo- 

 somes. Whether these cells are degenerating or are highly 

 specialized is of course problematical, but they do not affect the 



I 



1 1 1 r i i f .1 



1 1 1 1 > 1 1 1 1 



1 1 1 1 i ) i i % 



1 1 1 1 i 1 1 



8 



I I I C I I C t ^ 



ftffltrt*! 



Anasa tristis. 22 chromosomes, female type. Fig. 5. Cleavage nucleus. Fig. 

 6. Neuroblast. Fig. 7. Mesoderm. Fig. 8. Ectoderm. 



