TO THE EMBRYOLOGY OF AMPHIBIA. 77 



have been performed mostly by the dorsal, ventral, and left lips. 

 And to judge from the relative position of the two ex-ovates, in 

 regard to each other and to the embryo, the location of its body 

 must have been as in Fig. 96. This is similar to Group IV., Egg- 

 No. 4 (Fig. 79), but the inclination of the embryo body to the 

 blastopore is greater in this case than in that egg. 



Egg No. 5. 



Punctured at a point approximate!}' antipodal to the 

 place of the first appearance of the dorsal lip, as in the eggs 

 of the corresponding number in the other groups. Development 

 proceeded as in those eggs. Blastopore gradually closing pre- 

 sented an ovate shape, with the ex-ovate attached to its 

 acuminate ventral end. When it was nearly closed, there 

 was found a small yolk-plug on the top of which the ex-ovate 

 somewhat reduced in size was attached. It finally closed here. 

 Embryonic body extended from here forward. 



This egg, therefore, substantiates the results obtained in the 



eggs of the same number in Groups IL, and IV. 



Egg No. 6. 



Punctured at the approximate middle point close under 

 the dorsal lip (see the corresponding number in other groups). 

 3| hours afterward, appeared somewhat peculiar : two dorsal 

 lips, one above the other, as in Group IV., Egg No. 2 (Fig. 

 C8 d). The higher was probably the original one. A large, 

 rectangular ex-ovate exuded afresh behind the lower and actual 

 dorsal lip. Original ex-ovate attached to the middle point of 

 this». At 9:05 a.m., next day (April 29), the area of the 

 segmentation-cavity strongly acuminated toward the ex-ovates 

 (as in Group IV., Nos. 3 and G and No. 2, of this group), 

 and much more than the blastopore. 



Blastopore grew smaller and in the end would probably 

 have closed somewhat behind the large secondary ex-ovate 



