PROTOMONADINA 341 



Genus Proterospongia Kent. Stalkless individuals embedded irreg- 

 ularly in a jelly mass, collars protruding; fresh water. 



P. haeckeli K. (Fig. 138, g). Body oval; 8m long; flagellum 24-32ju 

 long; 6-60 cells in a colony. 



Genus Sphaeroeca Lauterborn. Somewhat similar to the last 

 genus; but individuals with stalks and radiating; gelatinous mass 

 spheroidal; fresh water. 



S. volvox L. (Fig. 138, h) . Cells ovoid, 8-12ju long; stalk about 

 twice as long; flagellum long; contractile vacuole posterior; colony 

 82-200> in diameter; fresh water. 



Genus Diplosiga Frenzel {Codonosigopsis Senn). With 2 collars; 

 without lorica; a contractile vacuole; solitary or clustered (up to 4); 

 fresh water. 



D. francei Lemmermann (Fig. 138, i). With a short pedicel; 12ju 

 long; flagellum as long as body. 



D. socialis F. (Fig. 138, j). Body about 15/x long; usually 4 clus- 

 tered at one end of stalk (15ju long). 



Family 3 Bicosoecidae Poche 



Small monomastigote; with lorica; solitary or colonial; collar may 

 be rudimentary; holozoic; fresh water. Taxonomy and morphology 

 (Grasse and Deflandre, 1952). 



Genus Bicosoeca James-Clark. With vase-like lorica; body small, 

 ovoid with rudimentary collar, a flagellum extending through it; 

 protoplasmic body anchored to base by a contractile filament 

 (flagellum?); a nucleus and a contractile vacuole; attached or free- 

 swimming. 



B. socialis Lauterborn (Fig. 139, a). Lorica cylindrical, 23/x by 

 12^; body about 10> long; often in groups; free-swimming in fresh 

 water. 



B. kepneri Reynolds. Body pyriform: 10m by 6m; lorica about 1.5 

 times the body length; flagellum about 30m long (Reynolds, 1927). 



Genus Salpingoeca James-Clark. With a vase-like chitinous lorica 

 to which stalked or stalkless organism is attached; fresh or salt 

 water. Numerous species (Pascher, 1925, 1929). Morphology (Hofe- 

 neder, 1925). 



S. fusiformis Kent (Fig. 139, 6). Lorica short vase-like, about 15- 

 16m long; body filling lorica; flagellum as long as body; fresh water. 



Genus Diplosigopsis France. Similar to Diplosiga but with 

 lorica; solitary; fresh water on algae. 



D. affinis Lemmermann (Fig. 139, c). Chitinous lorica, spindle- 

 form, about 15^ long; body not filling lorica; fresh water. 



