378 



BIOLOGY OF THE PROTOZOA 



1. Ilolophn/a, without definite or distinct trichites about mouth 



(Fig. iOG). 



2. Prorodon, with trichites, or basket, surrounding mouth 



(Fig. 1G5). 



Fig. 165. — Types of Ciliata. A, HopUtophrya lumhrici; B, Trachelocerca phani- 

 copieris; C, Prorodon niveus; D, Prorodon farebus; E, Urotricha farcata; F, Prorodon 

 teres; G, Prorodon armatus. (A, C, D, E, F, G, after Biitschli; B, after Calkins.) 



3. Actin()b()lus,\\ith long tentacles while at rest (Fig. 81, p. 154). 



4. Coleys, with cuirass of plates, posterior truncated th 



spines (Fig. 164). 



