8 4 



A. J. GOLDFARB. 



or extra-ovate as seen in Figs. 15, 16 and 17. In Figs. 17, 18 

 and 19, the two parts of the egg are equal or almost equal. , It is 

 sometimes difficult to distinguish between an egg with its equal- 

 sized extra-ovate, from one whose two blastomeres have been 



35 



34 



FIGS. 33-35- 



partially separated. In either case the volume of the whole egg 

 appears to be increased, sometimes suggesting an agglutination 

 of two whole eggs, as in Figs. 18 and 19. In Fig. 20 two eggs 

 have unmistakably agglutinated. Sometimes three eggs are 

 compressed together as in Fig. 21, or fused completely as in Fig. 22. 

 Since the eggs or blastomeres may be agglutinated at any point 

 of the surface and since the polarity of the egg is unaffected, the 

 cleavage planes may occupy any angle with respect to one 

 another, see Figs. 23, 24 and 25. Unless considerably distorted 

 as in Figs. 6 and 7, each blastomere divided at an angle deter- 

 mined by the angle of agglutination or separation. 



