Evidence from Protozoans 



387 



the cytoplasm of tlie cell, as observation indicates. While 

 the development is in progress the nucleus with its membrane, 

 chromatin mass and nuclear sap appears to remain intact 

 and holds its place in the deutomerite far removed from 

 the developmental changes under consideration. It is not 



ep.C, 



m^ 



^s& 



mm 



n* 





e-ptw- 



^--etJi^. 



?^U?#J 



i 



FIGURE i28. DEVELOP31EXT OF PYXIXIA MOBUSZI (afTER LEGER AND DUBOSCl). 



ep.c, epithelial cell, ep'm., epimerite. n., nucleus. 



impossible, indeed not improbable, that future investigation 

 will find that the nucleus is not so passive during this devel- 

 opment as the account here given indicates. Chromatin 

 granules may be proved to escape into the cytoplasm and 

 possibly to migrate to the region of developmental activity. 

 But supposing all this should be proved, there still would 

 remain the fundamental query : would such observation prove 



