PROTOX< )A 



49 



thus forming bristlelike structures, which the animal uses as 



feet lor walking. Near the mouth is a sharply defined band of 



cilia. The best-known member of this order is Stylonychia 



(Fig. 29). 



Order 5. Suctoria 



The Suctoria (Lat. sugere, to suck) differ from the other 

 Ciliata in having no cilia in the adult condition. They are 



F11;. 32. Dendrosoma radians, a colony of Suctoria. n, nucleus. (After Kent, from 



Calkins' Protozoa.) 



attached individuals, with a cuticular membrane and with <>r 

 without a stalk, and possess a number of delicate processes, the 

 tentacles, provided at the free end with a sort of sucking disk 

 (Fig. 32). The Suctoria feed on other animals, chiefly other 



