374 The Anhnal Kingdom 



has rounded knobs at the tips which act as suckers to catch and hold 

 the tiny ciUates that serve as food; the others are pointed. These 

 latter pierce the small ciliates and permit the soft body parts to pass 

 through the tentacle into the cell body of the suctorian. 



Representatives of this class live in fresh and salt waters and a 

 few are parasitic. Podophrya is a common fresh-water representative ; 

 Ephelota (Fig. \2\,D) is a common salt-water form. 



