274 PROTOZOOLOGY 



shoe-like structure, in which two nuclei are located; fresh water, 

 parasitic, or coprozoic. 



T. agilis D. (Fig. 127, i). More or less ovoid; 7-30^ long; 1 long 

 and 3 short flagella on each side; rotation movement; stagnant 

 water; also reported from intestine of Amphibians. 



T. rolans Klebs (Fig. 127, j). Broadly oval; posterior half highly 

 flattened; 2 long and 2 short flagella on each of 2 cytostomes; 

 stagnant water. 



Genus Gyromonas Seligo. Free-swimming; small; form con- 

 stant, flattened; slightly spirally coiled; 4 flagella at anterior end; 

 cytostome not observed; fresh water. 



G. ambulans S. (Fig. 127, k). Rounded; 8-15yu long; standing 

 water. 



Genus Trigonomonas Klebs. Free-swimming; pyriform; plastic; 

 cytostome on either side, from anterior margin of which arise 3 

 flagella; flagella 6 in all; 2 nuclei situated near anterior end; move- 

 ment rotation; holozoic; fresh water. 



T. compressa K. (Fig. 127, I). 24-33^ by 10-16m; flagella of 

 different length; standing water. 



Genus Urophagus Klebs. Somewhat similar to Hexamita; but 

 a single cytostome; 2 moveable posterior processes; holozoic; 

 stagnant water. 



U. rostratus (Stein) (Fig. 127, m). Spindle-form; 16-25iu by 

 6- 1 2m. 



Suborder 3 Polymonadina 



This group includes forms which inhabit the intestine of 

 various species of termites, most probably as symbionts. The 

 majority are multinucleate. Each nucleus gives rise to a basal 

 body (from which flagella extend), a parabasal body, and an 

 axial filament. Janicki called this complex a karyomastigont, and 

 the other type of complex which does not contain a nucleus 

 akaryomastigont. 



Genus Calonympha Foa. Body rounded; large; numerous long 

 flagella arise from anterior region; nuclei arranged near insertion 

 points of flagella; with karyomastigonts or akaryomastigonts; 

 axial filaments form a bundle; in termite gut. 



C. grassi F. (Fig. 128, a). In Cryptotermes grassii; Q9-90fjL long. 



Genus Stephanonympha Janicki. Oval, but plastic; pellicle 

 sculptured with foreign bodies ; numerous nuclei spirally arranged 

 around anterior end; in termite gut. 



