OPALINID CILIATE INFUSORIANS — METCALF 



569 



REVIEW OF THE CLASSIFICATION AND GEOGRAPHIC DISTRIBU- 

 TION OF THE OPALINIDAE 



The relationsliips of the Ciliata may be expressed in the following 

 classification, and the phylogeny of the Opalinidae is shown in figure 

 126. 



Opalinae 

 latae 



FiGDRB 126— Phylogeny of the Opalinidae 



CILIATA 



Peotociliata (Opalinidae) 

 Protoopalininae 

 Protoopalina 

 Zelleriella 

 Opalininae 

 Cepedea 

 Opalina 



Opalinae latae 

 Opalinae angustae 

 Etjciliata 



