G. S. WEST ON SOME NEW AFRICAN SPECIES OF VOLVOX. 103 



mother-colony. In fact, a fourth generation is not at all un- 

 common {vide Fig. 10), and all the specimens seen exhibited to a 

 marked degree the three generations. The ovoid form of the 

 colony is not entirely due to compression within the confined 

 space or the mother-colony, as examples were observed in which 

 only one parthenogonidium had developed into a daughter-colony, 

 and this was of the typical ovoid form although there was ample 

 room for its development. 



The cells of the adult colony are similar to those of F. airj-eus 

 in relative number and spacing, but no protoplasmic connections 

 could be observed. Length of colony, 345-610/x; breadth, 

 295-480/a. 



One male colony was associated with the purely asexual 

 colonies, and perhaps represents the male colony of the same 

 species of Volvox. This colony exhibited a distinct polarity in 

 the development of the androgonidia, and differed in no essential 

 particular from the male colony of V. aureus. It is to be 

 regretted that a number of sexual colonies in various stages could 

 not be found, as one might then have been much more certain of 

 the true relationships of this species of Volvox. 



From available material, I can only suggest that it is a Volvox 

 near to V. aureus, but differing in the form of its vegetative (or 

 asexual) colonies, in the great development and compression of 

 the daughter-colonies before they are set free, and in the fact 

 that three (and often four) generations of colonies always appear 

 to be well marked. These characters appear to be sufficient for 

 its identification, and it seems proper to regard it as a new species 

 or new race of Volvox for which I would suggest the name 

 V. africanus. 



As yet no trace of this Volvox has been seen from the other 

 large lakes of Central Africa, and it should be remarked that 

 they have been much more thoroughly investigated than the 

 Albert Nyanza. 



A Species of Volvox from Australia. 



One of Mr. Rousselet's slides contained two species of Volvox 

 from Heidelberg, near Melbourne, Australia.* One of these is 



* These were collected by Mr. W. J. Hocking and sent to Mr. D. J 

 Scourfield. 



JouRN. Q. M. C, Series II. No. 67. 8 



