518 



BIOLOGY OF THE PROTOZOA 





D 



Fig. 209. — Types of Ciliata. A, Amphisia kessleri; B, Uroleptus pisces; C, Histrio 

 pellionella; D, Strong ylidium sp. ; E, Oxytricha pellionella; F, Oxytricha fallax. (A, 

 after Calkins; B, C, D, E, after Biltschli; F, after Stein.) 



