232 



TORREY 



mate of the total number at least sixteen. Treadwell has figured 

 a number of similar cells in Podarke and thinks it very probable 

 that they also occur in Lepidonottis. 



The fate of all these cells is most remarkable. Soon after 



i\.i.i.\ 



Fig. io. 



their formation they begin to decrease in size and the nuclei 

 become still more closely reticulated (Text-Fig. lo, A). After 

 a time they begin to sink in between the blastomeres (Text-Fig. 

 10, B) and finally lie inside the cleavage-cavity (Text-Fig. lo, 



