THE FUNDAMENTAL ORGANIZATION 67 



the pole plates is suggestive of ameba ectoplasm. With our present 

 knowledge I am inclined to agree with this interpretation of pole 

 plates and to regard Paramecium caudatum, with other species of 

 this genus, Actinosphaerium eichhornii and the other forms men- 



c-.e.tv. 



C.St 



Fig. 35.— Paramecium caudatum. Section of a dividing individual; c. st., con- 

 necting strand of dividing micronuclei; e. tr., extruded trichocysts; a. v., gastric 

 vacuole; .1/, dividing macronucleus; m, m, divided micronuclei;^?-., trichocysts. 

 (Original.) 



