9i8 



GENERAL METABOLISM 



[PT. Ill 



plication have to come into play to supply the cells of the embryo 

 with their yolk. 



It is probable that the amount of yolk furnished to the egg by 

 the parent has a good deal to do with determining whether its 

 cleavage shall be complete or partial. Thus Peter's table (Table 109) 



Table 109. 



shows that the larger the tgg the more likely it is to cleave only 

 partially and to require special absorption methods, and the same 

 thing is shown (roughly) by the relation between the size of the 

 egg and the ratio between macromere and micromere sizes. In other 

 words, the more yolk the egg has, the larger the yolk-laden macro- 

 meres will be compared to the micromeres. ± 



