868 PROTOZOOLOGY 



Genus Cometodendron S. Body elongate; attached to substrate 

 by a "foot," well-developed arms; short and pointed tentacles at the 

 ends of arms; simple endogenous gemmation. 



C. clavatum S. (Fig. 368, h). 150/* by 40-50/*; the foot 20-22/*; on 

 Acanthogammarus victorii, etc.; Lake Baikal. 



Family 4 Podophryidae Bi'itschli 



Genus Podophrya Ehrenberg. Subspherical; normally with a rigid 

 stalk; suctorial tentacles in fascicles or distributed on entire body 

 surface; encystment common; fresh or salt water. Many species. 



P. fixa Miiller (Fig. 368, i, j). Spherical; tentacles of various 

 lengths; stalked; nucleus spheroid; one contractile vacuole; 10-28/* 

 long; fresh water. 



P. collini Root. Ovoid; stalked; 30-60 capitate tentacles, dis- 

 tributed; nucleus spherical; one contractile vacuole; 40-50/t in di- 

 ameter; in swamp (Root, 1914). 



P. elongata Wailes (Fig. 368, k). Elongate; flattened; with a pedi- 

 cel; tentacles distributed; nucleus cylindrical; 95-105/* long; stalk 

 65-85/* by 7-9/*; on the marine copepod, Euchaeta japonica; Van- 

 couver. 



Genus Parapodophrya Kahl. Spherical; tentacles radiating, a few 

 long, more or less conical at proximal portion; stalk thin; salt water. 



P. typha K. (Fig. 369, a). 50-60/* in diameter; salt water (Kahl, 

 1931). 



Genus Sphaerophrya Claparede and Lachmann. Spherical, with- 

 out stalk; with or without distributed tentacles; multiplication by 

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

 sitic. 



S. soliformis Lauterborn (Fig. 369, b). Spherical; numerous tenta- 

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

 cleus oval; diameter about 100/z; 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 ciliated on posterior 

 end; the other end with capitate tentacles; nucleus spheroid; 2 con- 

 tractile vacuoles; about 50/* long. 



Genus Paracineta Collin. Spherical to ellipsoidal; tentacles dis- 

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



P. limbata (Maupas) (Fig. 369, c, d). With or without gelatinous 

 envelope; 20-50/* in diameter; swarmer with many ciliated bands, 

 contractile; on plants and animals in salt water. 



