404 HANDBOOK OF PROTOZOOLOGY 



Sphaerophrya soliformis Lauterborn (Fig. 172, g). Saplo- 

 pelic. Diameter about 100 microns. 



Genus Paracineta Collin. Body covered by a closely fitting 

 delicate test. Stalked; several species. Many which had been 

 called Acineta have been placed in this genus by Collin. 



Paracineta limhata (Maupas) (Fig. 172, h). Marine; among 

 algae, bryozoans, hydrozoans, etc. 



Genus Metacineta Biitschli. Test coarse; with fasciculated 

 tentacles. 



Metacineta mystacina (Ehrenberg) (Fig. 173, a). Fresh or 

 salt water. 



Genus Urnula Claparede and Lachmann. Tentacles one to 

 three in number. 



Urnula episiylidis Claparede and Lachmann. 



Family 5 Acinetidae Biitschli 



Genus Acineta Ehrenberg. Body usually pyramidal, and 

 encased in a cup- or funnel-like stalked test. The test has no 

 free margin. Suctorial tentacles in groups or scattered at the 

 non-stalked end. More than twenty species recorded. 



Acineta divisa Fraipont (Fig. 173,/). Salt water. Body 27 

 microns long; tentacles 65 microns long; length of stalk 100 

 microns . 



Acineta tuberosa Ehrenberg (Fig. 173, g). Salt water. 

 Body large, 330 microns long. 



Genus Tokophrya Biitschli. Stalked; body pyriform or 

 pyramidal; with fasciculated tentacles. Numerous species. 



Tokophrya infusionum (Stein) (Fig. 173, b-d). 



Tokophrya cyclopum Claparede and Lachmann (Fig. 173, e). 

 Attached to Cyclops, Diaptomus, Gammarus, etc. 



Genus Thecacineta Collin. Body more or less elongated. 

 The stalked test rigid and shows free margin. Suctorial ten- 

 tacles from the anterior end. Several species. 



Thecacineta cothurnioides Collin (Fig. 173, h). Attached to 

 the copepod, Cletodes longicaudatus . 



Genus Periacineta Collin. Close-fitting test elongated and 

 attachment by a short narrowed test or stalk(?). The other 

 end is open without free margin. Fasciculated tentacles at the 

 anterior end. 



