650 The American Naturalist. [August, 
; 7, Union of the interchanged micronuclei. 
th 
t 
l eee S 
F 
(From Weismann, after Maupas.) 1, Two Infusoria copulating ; M, meganucleus; 7, micronucleus; 2-5, Succes- 
f one of th 
Fic. 10.—THE CONJUGATION OF INFUSORIA. 
$ RS 
sive divisions of micronuclei; 6, Th 
E N SEES 
