286 



PROTOZOOLOGY 









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Fig. 115. Species of Volvox ("Smith), a, b, Volvox globator (a, a female 

 colony, X150; b, a zygote, X370); c-e, V. aureus (c, a young partheno- 

 genetic colony; d, a mature male colony, X125; e, a zygote, X370); f-h, 

 V. spermatosphaera: f, a parthenogenetic colony, X185; g, a mature male 

 colony, X370; h, a zygote, X370); i, a zygote of V. weismannia, X370; 

 j, k, V. per globator (j, a male colony, XI 50; k, a zygote, X370). 



