Experimental Studies on Germinal Localization. 235 



In the following description the typical case is described; at- 

 tention is again called to the fact that the unequal divisions are 

 frequently less unequal than in the normal and sometimes be- 

 come quite equal. 



Fig. X. 

 Isolated 1/2-BIastovicres, Patella; x 250 

 100, successive camera outlines, showing relative sizes of whole egg, and 

 the y2, % and ^^-'blastomeres; loi, 4/2-ceIl stage; 102, 8/2-cell stage; 103, 

 16/2-cell stage, nearly typical open type, from above; 104, slightly less open 

 form from the side; 105. 106, 16/2-cell stages, closed type; 107, 32/2-cell stage, 

 closed type; 108, open blastula, from the open side. 



