HOLOTRICHA 



707 



Genus Tiarina Bergh. Somewhat similar to Coleps, but posterior 

 end tapering to a point; salt water. 



T.fusas (Claparede and Lachmann) (Fig. 302, g). 85-135/* long. 



Family 5 Actinobolinidae Kent 



Genus Actinobolina Strand (Actinobolus Stein). Ovate or spheri- 

 cal; ciliation uniform; extensible tentacles among cilia; contractile 

 vacuole terminal; macronucleus curved band; fresh water. 



A. vorax (Wenrich) (Fig. 302, h). Body 100-200/* long; elongate 

 oval to spheroid; yellowish brown in color; cytostome at anterior 

 end; contractile vacuole terminal; macronucleus rope-like; 30-60 



Fig. 302. a, Coleps hirtus, X530 (Noland);b, C. elongatus, X530 (No- 

 land); c, C. bicuspis, X530 (Noland); d, C. octospinus, X530 (Noland); 

 e, C. spiralis, X400 (Noland); f, C. heter acanthus, X400 (Noland); 

 g, Tiarina fusus, X530 (Faure-Fremiet) ; h, Actinobolina vorax, X300 

 (Wenrich); i, Dactylochlamys pisciformis, X330 (Kahl); j, Enchehjomor- 

 pha vermicularis, X670 (Kahl). 



