428 G. S. WEST ox THE TWO AFRICAN SPECIES OF VOLVOX, 



Figs. 4-6. Volvox africanus. 4 and 5, female colonies with 

 ripe oospores, x 74. 6, outline of ripe oospore, x 500. 



JFigs. 7 and 8. Volvox Rousseletii. 7, male colony showing 

 marked polarity in respect of the antheridia,x 50. 8, 

 female colony with large number of ripe oospores and 

 also showing polarity, x 50. 



journ. QuckcU Microscopical Club, iSer, 2, Vol. XIII,, No. 83, yovembtir 1j. 



