FIG. 2. V. Rousselttii and V. capensis. Development of the gonidium. 



A, Gonidium and somatic cells from recently inverted colony ; B, C, side and surface views of enlarging 

 gonidia before and after loss of cilia ; D-F, the same of 2, 4, and 8-celled stages ; G, 16-celled stage ; 

 H-J, sections of developing embryos to show formation of free lip of phialopore ; K, L, phialopore on 

 completion of cell-division ; in K, surrounding cells of the parent colony shaded. 

 A x 2000; B-G x 1000; H-J x 300 ; K, L x 1250; all approximately. 

 VOL. XVI, PART 3. 37 



