A 10.50 a.nrT. 



G 12.30 



J 12.50 p.m. 



K 12.53 p.m. 



p.m. 



FIG. 3. V. Rousseletii and V. capensis. Inversion of the daughter colony. 

 A-D, preparation ; E-L, inversion. 



A , Lip of phialopore depressed, denting beginning ; B, denting more extensive ; 

 C, dents smoothing out, lips straightening ; D, lip straight, colony rounded 

 out again ; E, equatorial constriction forming (" Hour-glass " stage) ; F, 

 contraction spread over posterior half ; G, infolding of posterior half beginning ; 

 H, infolding complete ; I, posterior half beginning to emerge through much 

 enlarged phialopore (" Hat " stage) ; J, " Flask " stage beginning ; K, 

 " Flask " stage ending ; L, inversion complete, lobes of phialopore closing. 



All x 200 approximately. 



