POLYMASTIGINA 377 



of snakes: Pituophis, Eutaenia, and Python (Kofoid and Swezy, 

 1915). 



E. balrachorum (Dobell) (Fig. 158, c). Ovoid; 6-20/x long; in 

 intestine of Ranafusca (Dobell, 1909). 



E. axostylis Kirby (Fig. 158, d). Elongate, ellipsoid, or pyriform; 

 axostyle projecting; 5-10.5/xby 2-3.5/*; 3 anterior flagella 5-1 0/x long; 

 in gut of Nasutitermes kirbyi (Kirby, 1931). 



Genus Chilomitus da Fonseca. Elongate oval; pellicle well de- 

 veloped; aboral surface convex; cytostome near anterior end, 

 through which four flagella originating in a bi-lobed blepharoplast, 

 protrude; rudimentary axostyle; nucleus and parabasal body below 

 the cytostome (da Fonseca, 1915). 



C. caviae da F. (Fig. 158, e). In the caecum of guinea-pigs; stained 

 trophozoites 6-14/i by 3.1-4.6/x; cytoplasm contains siderophilic 

 bodies of unknown nature (Nie, 1950). 



Genus Hexamastix Alexeieff. Body similar to Eatrichomastix, 

 but with 6 flagella, of which one trails; axostyle conspicuous; para- 

 basal body prominent. 



H. termopsidis Kirby (Fig. 158, /). Ovoidal or pyriform; 5-1 1m 

 long; flagella 15-25^ long; in gut of Zootermopsis angusticollis and 

 Z. nevadensis; California (Kirby, 1930). 



H. caviae and H. robustus were described by Nie (1950) from the 

 caecum of guinea-pigs. 



H. balrachorum Alexeieff (Fig. 158, g). Oval or spindle form; 8-14ju 

 by 4-8ju; flagella about body length; in gut of Triton taeniatus. 



Genus Protrichomonas Alexeieff. 3 anterior flagella of equal 

 length, arising from a blepharoplast located at anterior end; para- 

 sitic. 



P. legeri A. (Fig. 158, h). In oesophagus of the marine fish, Box 

 boops. 



Genus Monocercomonoides Travis (Monocercomonas Grassi). 

 Small; 4 flagella inserted in pairs in two places; two directed an- 

 teriorly and the other two posteriorly; axostyle filamentous; para- 

 sitic. Taxonomy (Travis, 1932). 



M. melolonthae (Grassi) (Fig. 158, ?'). Ovoid: 4-1 5/x long; in the 

 larvae of Melolontha melolontha, etc. 



Genus Cochlosoma Kotlan. Body small, oval; sucker in the an- 

 terior half; 6 flagella; axostyle filamentous; parasitic (Kotlan, 1923). 



C. rostratum Kimura (Fig. 158, j). In the colon of domestic ducks, 

 Anas platyrhynchus and Carina moschata; 6-10m by 4-6. 5^ (Kimura, 

 1934). McNeil and Hinshaw (1942) observed this organism in the 

 intestine of young poults and in the region of caecal tonsil in adults. 



