15 Didlnlum 



IftCondyTsroma * ,8 ' Tr «he.iu 5 mophryogleaa 

 iropalinopsls 



Fig. 19. — Various forms of Ciliata. qa shows part of a colony, b a single zooid, and 

 C a couple of nematocysts; a, anus; c. vac, contractile vacuole; f. vac, food 

 vacuole; g, gullet; mg. nu, meganucleus; mi. nu, micronucleus; ?nth, mouth; 

 nu, nucleus; ntc, nematocyst; t, tentacle; u. mb, undulating membrane; vac, 

 non-contractile vacuole; vst t vestibule. (From Biitschli's Frotozoa i after vari- 

 ous authors.) 



E 49 



