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HANDBOOK OF PROTOZOOLOGY 



Group 1 



Genus Enteromonas da Fonseca. Body globular. Two an- 

 terior flagella and one trailing flagellum. 



Enteromonas hominis da Fonseca (Fig. 58, a). Body small, 

 5 to 6 microns in diameter. In human feces. 



Genus Tricercomonas Wenyon and O'Connor. Body similar 

 to that of Cercomonas, but with three anterior flagella and a 

 posterior flagellum. Parasitic. Oblong cyst with four nuclei 

 when mature. 



Fig. 58 



a. Enteromonas hominis. XlOOO (After da Fonseca). 



b. Tricercomonas intestinalis. X1300 (After Wenyon and O'Connor). 



c. Tetramitus rostratus. X500 (After Klebs). 



d. T. pyrijormis. X500 (After Klebs). 



e. Copromastix prowazeki. X800 (After Aragao). 



f. Streblomastix strix. X800 (After Kidder). 



Tricercomonas intestinalis Wenyon and O'Connor (Fig. 58, b) 

 In human intestine. Body 4 to 8 microns long. Rare, but widely 

 distributed. 



Genus Tetramitus Perty. Body ellipsoidal or pyriform. 

 Four anterior flagella, unequal in length, one may be a trailing 

 flagellum. Cystome distinct. Contractile vacuole. Holozoic. 

 Fresh or salt water. 



Tetramitus rostratus Perty (Fig. 58, c). Form variable; 

 about 25 to 28 microns long. In stagnant water. 



Tetramitus pyriformis Klebs (Fig. 58, d). About 18 microns 

 long. In infusion. 



Genus Copromastix Aragao. Four anterior flagella equally 

 long. Body triangular or pyramidal. Coprozoic. 



Copromastix prowazeki Aragao (Fig. 58, e). In human and 

 rat feces. About 16 to 18 microns long. 



Genus Streblomastix Kofoid and Swezy. Body elongated; 



