SUCTORIA 633 



P. typha K, (Fig. 287, a). 50-60At in diameter; salt water. 



Genus Sphaerophrya Claparede et Lachmann. Spherical, with- 

 out stalk; with or without distributed tentacles; multiplication 

 by binary fission or exogenous budding; fresh water, free-living 

 or parasitic. 



S. soliformis Lauterborn (Fig. 287, h). Spherical; numerous 

 tentacles about 1/4-1/3 the body diameter; a contractile vacuole; 

 nucleus oval; diameter about 100m; sapropelic. 



S. magna Maupas. Spherical; about 50/x in diameter; numerous 

 tentacles of different length; nucleus spheroid; standing fresh 

 water with decaying vegetation. 



S. stentoris M. Parasitic in Stentor; swarmers ciHated on pos- 

 terior end; the other end with capitate tentacles; nucleus 

 spheroid; 2 contractile vacuoles; about 50/i long. 



Genus Paracineta Collin. Spherical to ellipsoidal; tentacles 

 distributed ; mostly in salt water, a few in fresh water. 



P. limhata (Maupas) (Fig. 287, c, d). With or without gelat- 

 inous envelope; 20-50)U in diameter; swarmer with many ciliated 

 bands, contractile; on plants and animals in salt water. 



Genus Metacineta Biitschli. Lorica funnel-shaped, lower end 

 drawn out for attachment; tentacles grouped at anterior end; 

 nucleus spherical; one contractile vacuole. One species. 



M. mystacina (Ehrenberg) (Fig. 287, e). Lorica up to 700ai long; 

 in fresh and salt water. 



Genus Urmula Claparede et Lachmann. Lorica colorless; lower 

 end pointed, attached; aperture narrowed, round or triangular; 

 body more or less filling lorica; 1-2 (up to 5) long active tentacles; 

 nucleus central, oval; one or more contractile vacuoles; fresh 

 water, 



U. epistylidis C. et L. (Fig. 287,/). Up to 80At long; on EpistyHs, 

 Dendrosoma, etc. 



Genus Lecanophrya Kahl. Body rounded rectangular in cross- 

 section; anterior region bowl-shaped; somewhat rigid tentacles 

 located on inner surface of bowl; salt water. 



L. drosera K. (Fig. 287, g). 40-70/^ high; hollow stalk; tentacles 

 in 3-5 indistinct rows; attached to antennae of the copepod, 

 Nitocra typica. 



Genus Ophryocephalus Wailes. Spheroidal, stalked; a single 

 long mobile, capitate tentacle; multiplication by multiple exog- 

 enous budding from apical region; on Ephelota gemmipara and 

 E. coronata (p. 641); salt water. One species. 



