No. 498] 



NOTES AND LITERATURE 



423 



These differ from the common Aitmha pn>f< its (|iiite as markedly 

 as do other genera of rhizopods, and whether they differ gener- 

 ically among themselves is a matter to he decided only when the 



little consecutive work on the changes of the protoplasm from 

 beginning to end of the life cycle. Indeed, biologists would have 

 extreme difficulty in picking up the thread of such a life history 

 at either end, for observations and descriptions of conjugation 

 or fertilization are most contradictory and confusing. The 

 confusion will probably straighten out as soon as it is recognized 

 that the varied accounts undonbtedly refer to quite different 

 species or even genera of organisms. Schaudinn's description 



