l8o AMPHIMIXIS OR ESSENTIAL MEANING OF [XIT. 



hereditary substance, we are enabled to state that the essence 

 of both conjugation and fertiUzation is nothing more than a 

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



hifusorian A 



M M 



Infusorian B 



M M 



Fig. XII. 

 Diagram of the changes undergone by the micronucleus during the 

 canjugation of a Ciliate Infusorian ; (after the diagram given by Maupas 

 in the case of Colpidium truncatum) . 



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 



