H 2.43 p.m. 



| 2.45 p.m. 



J 2.50 p.m. 



FIG. 7. Development of sperm globoid (continued). 



A-D, V. Rousseletii A, Cells from recently inverted globoid ; B, C, escape of the 

 spermatozoids, B, beginning of escape, C, escape nearly complete, a few still 

 swimming round inside the vesicle wall which is now distinguishable ; D, 

 spermatozoids. E-J, V. capensis E-I, Inversion of sperm bundle showing 

 position of the phialopore ; J, globoid in surface view immediately after 

 inversion, cilia lengthening. 

 A x 1750; B x 800; C x 900; D x 3500; E-J x 750, all approximately. 



