^S2 



The Unity of llie Organism 



tista," ^ the implication being that the protozoa are not 

 "time animals." "Organless organisms" is an appellation 

 one not infrequently finds applied to protozoa. 



(«) Comparison of Certain CUiates and Metazoans 



By way of introduction to the commentary I wish to make 

 on this mode of thinking, I ask the reader to compare the 

 pictures, figures 1 and S, keeping the idea of cell as much 



cnt.cav.* 



ms 



FIGURE 2. HYDRA (aFTER PARKER AND PARKER). 



ect., ectoderm. end., endoderm. ent.oav., enteric cavity. mth., 

 mouth. hyp., hypostonie. msgl., mesogloea. ntc, nematocysts. 

 psd., pseiidopods. fl., tiagella. bd., buds, spy., spermary. ovy., 

 ovary, ov., ovum. 



