3022] Recs: The Neuromotor Apparatus of Para) 



345 



The evidence does not indinate that the neuromotor fibers take part 

 in mitosis or division. It indicates rather that tlie behavior is very 

 similar to that in EupJotes (Yoeom, 1918). In the latter, however, 

 the cytostome of the mother animal marks the place of origin of the 

 cytostome of the anterior rather than the posterior dauprhter. The 

 difference here is no doubt accounted for in the posterior location of 

 the cytostome of Paramaecium. 



Figs. C, D, E. Three views to show fate of old cytostome, eytopharynx, 

 and contractile vacuoles, and the origin of new structures in the two animals. 

 Slightly modified after Child. Abbreviations: i'., contractile vacuoles of un- 

 divided animals; v. I., new contractile vacuoles; mic, micronucleus; o. gr., oral 

 groove; mac, macronucleus; cyt., cytostome; cyp., eytopharynx. 



The Neuromotor Apparatus of Paramaecium Compared with that 

 OF THE Flagellates and with other Ciliates 



The neuromotor fibers of flagellates are connected with the centro- 

 blepharoplast complex which functions in mitosis. 



Trichonympha is a flagellate covered with cilialike flagella (Kofoid 

 and Swezy, 1919) which are connected to the blepharoplast by a net- 

 work of oblique fibers. In Paramaecium the cilia are also connected 

 to a definite center bv fibers. It is significant that in these two 



