516 



Philippine Journal of Science 



1919 



CampbeUosphaera 

 cbversa 



Vol vox carteri 

 (w&ismwiwia) 



Volvox 



rousseleti 



V. africanus 

 V. tertvus 



V. spcrmaiosphaera 



Besscyosphaera 

 poiversi 



V. perglobator 

 V. globator 



V. amreus 



Platydorina 



Chfomyd&nwnas 



Fig. 1. Phylogeny of the Volvocese. 



A series of specimens is described which supply the salient 

 features of a rounded life history with asexual and sexual repro- 

 duction. Many details are left for future work and workers. 

 The sexual coenobia are monoecious. 



Formal diagnoses of the genus and species are followed by 

 a comparison of the new genus with the recorded species of 

 Volvox and closely related genera. Some existing synonomy 

 is pointed out, reducing V. weismannia Powers to V. carteri 

 Stein, and some future synonomy is foreshadowed. 



Volvox aureus Ehrenberg is reported as having been collected 

 in California in 1896. The specimens were found to agree 

 closely with the ample description of the species by Klein ('89A 

 and '90). 



