256 PROTOZOOLOGY 



free-swimming or attached; anterior end obliquely truncate; 

 fresh water. 



M. socialis (Kent) (Figs. 8, g; 119, c). Spherical; 5-10^ long; 

 among decaying vegetation in fresh water. 



M. vestita (Stokes) (Fig. 119, d). Spherical; about 13.5/x in 

 diameter; stalk about 40;u long; pond water. Reynolds (1934) 

 made a careful study of the organism. 



Genus Stokesiella Lemmermann. Body attached by a fine 

 cytoplasmic thread to a delicate and stalked vase-Hke lorica; 

 2 contractile vacuoles ; fresh water. 



S. dissimilis (Stokes) (Fig. 119, e). Solitary; lorica about 28yu 

 long. 



S. leptostoma (S.) (Fig. 119,/). Lorica about 17yu long; often in 

 groups; on vegetation. 



Genus Stylobryon Fromentel. Similar to Stokesiella; but 

 colonial; on algae in fresh water. 



S. ahbotti Stokes (Fig. 119, g). Lorica campanulate; about 17^ 

 long; main stalk about 100 fj. high; body oval or spheroidal; 

 flagella short. 



Genus Dendromonas Stein. Colonial; individuals without 

 lorica, located at end of branched stalks; fresh water among 

 vegetation. 



D. virgaria (Weisse) (Fig. 119, h). About S/j, long; colony 200ijl 

 high; pond water. 



Genus Cephalothamnium Stein. Colonial; without lorica, but 

 individuals clustered at end of a stalk which is colorless and 

 rigid; fresh water. 



C. cyclopum S. (Fig. 119, i). Ovoid; 5-10^ long; attached to 

 body of Cyclops and also among plankton. 



Genus Anthophysa Bory. Colonial forms, somewhat similar to 

 Cephalothamnium; stalks yellow or brownish and usually bent; 

 detached individuals amoeboid with pointed pseudopodia. 



A. vegetans (Mliller) (Fig. 119, j, k). About 5-6/z long; common 

 in stagnant water and infusion. 



Family 9 Bodonidae Btitschh 



With 2 flagella; one directed anteriorly and the other pos- 

 teriorly and trailing; flagella arise from anterior end which is 

 drawn out to a varying degree; one to several contractile vacuoles; 

 asexual reproduction by binary fission; holozoic or saprozoic 

 (parasitic). 



