PROTOMONADINA 



269 



Genus Codosiga Kent {Codonocladium Stein; Astrosiga Kent). In- 

 dividuals clustered at end of a simple or branching stalk; fresh water. 



C. uiriculus Stokes (Fig. 116, 6). About ll/x long; attached to fresh- 

 water plants. 



C. disjuncta (Fromentel) (Fig. 116, c). In stellate clusters; cells 

 about 15/x long; fresh water. 



Genus Monosiga Kent. Solitary; with or without stalk; occasion- 

 ally with short pseudopodia; attached to freshwater plants. Several 

 species. 



Fig. 116. a, Phalansterium digitatum, X540 (Stein); b, Codosiga 

 utriculus, X1340 (Stokes); c, C. disjuncta, X400 (Kent); d, Monosiga 

 ovata, X800 (Kent); e, M. robusta, X770 (Stokes); f. Desrnarella monili- 

 formis, X800 (Kent); g, Protospongia haeckeli, X400 (Lemmermann); 

 h, Sphaeroeca volvox, X890 (Lemmermann); i, Diplosiga francei, X400 

 (Lemmermann); j, D. socialis, X670 (Franc6). 



M. ovata K. (Fig. 116, d). 5-1 5^ long; with a short stalk. 



M. robusta Stokes (Fig. 116, e). 13/i long; stalk very long. 



Genus Desrnarella Kent. Cells united laterally to one another; 

 fresh water, 



D. moniliformis K. (Fig. 116, /). Cells about 6m long; cluster com- 

 posed of 2-12 individuals; standing fresh water. 



