Volvox globator Ehrenberg. An adult asexual colony, highly magni- 

 fied. The hexagonal areas represent the gelatinous coats of the 

 individual cells in surface view. The thin common envelope of 

 the whole colony is seen round the circumference. In the hinder 

 half of the colony are seen two of the large asexual reproductive 

 cells, and various stages of their development into daughter- 

 colonies. The two most advanced daughter-colonies have already 

 secreted a common envelope of their own. (After A. Lang.) 



