l8o AMPHIMIXIS OR ESSENTIAL MEANING OF [XII. 



hereditary substance, we are enabled to state that the essence 

 of both conjugation and fertilization is nothing more than a 

 mingling of the hereditary substances of two individuals. I pro- 



Infisorian A 



m J/ M VI 



hfusorian B 



m M M m 



Fig. XII. 



Diagram of the changes undergone by the micronucleus during the 

 conjugation of a Cihate Infusorian ; (after the diagram given by Maupas 

 in the case of Colpidium tntncatuni). 



pose to introduce the term Amphimixis to indicate such a 

 process of mingling of the idioplasm from two individuals. 

 The usefulness and indeed the necessity for some such special 





f 



