49 



Figs. 93 and 94 » Everted sperms in the shells of eggs from 

 the oviduct, c.h., central hody ejected; r. , collar. 



Fig. 95. The portion of the sperm v/hlch remains on the 

 outside of the egg seen from the hottom of the nuclear cup. 



Pig. 96. Sperm on the shell of the egg with nuclear cup 

 next to the shell. 



Pig. 97. A sperm that has exploded with nucleus next to 

 the egg. 



Figs. 98-111. Portions of eggs with sperms, taken from 

 the oviduct or soon after leaving It. 



Figs. 98 and 99 . Show the nuclear cup falling away from 

 the egg and pulling a strand of some suhstance out with it. 



Fig. 100. Sperm-vesicle with the strand from which the 

 nuclear cup has hroken away, projecting through the shell 

 into the vesicle. 



Pig. 101. Sperm-vesicle just inside the shell. 



Pigs. 102 and 103. Sperm-vesicles lying on the cytoplasm. 



Fig. 104. Sperm-vesicle that has just entered the cyto- 

 plasm, v., vitelline memhrane. 



Pigs. 105-108. Sperm-vesicles down in the cytoplasm. 



Pig. 109. Sperm-vesicle with capsular wall projecting 

 out of it. 



Pig. 110. Sperm-vesicle seen from one side; shows vesi- 

 cular structure. 



Pig. 111. Sperm-vesicle seen from top-vesicular struc- 

 ture. 



Pig. 112. Sperm-vesicle in egg 1 hour, 15 minutes old. 

 This may now "be called the male pronucleus. 



Pig. 113. 'Rgg from the lumen of the ovary showing the 

 spindle of the first miotic division. 



Fig. 114. First polar body of an egg Just spawned. 



Pigs. 115 and 116. Two pronuclei found in one egg Z 

 \ and 15 minutes old. 



Fig. 117. Egg 2 hours 15 minutes old, h., transverse sec- 



