44 



SUPER-ORGANIC EVOLUTION 



B 



FIG. SA. 



B, trunk of the epithelium of the actinia ; n, the neuro-epithelial cell some- 

 what separated from its natural position ; e, cells of support with 

 vibratory cilia. 



FIG. SB. 



The isolated neuro-epithelial cells of an actinia (ccelenterade). a, peripheric 

 end of the cell with its non-vibrative cilium ; &, thick part of the 

 cellular body which contains the nucleus ; c, base of the cell with its 

 slender prolongations, which serve to open up communication with 

 nervous subsidiary cells. 



