632 



FAMILY: CERCOMONADID^ 



Liebetanz (1910) described three species of Cercomonas from the 

 stomach of cattle. These differ from one another only in size, and as no 

 indication is given of the posterior flagellum, it seems very probable that 

 they are merely elongate forms of the organisms which he describes as 

 Sphceromonas, and which have been dealt with above. 



Castellani and Chalmers (1910) described as Heteromita zeylcniica a 

 flagellate seen in human faeces in Ceylon. 

 It was again recorded by Castellani (1917) 

 from Macedonia. The statement that a 

 flagellum existed at each end of the body 

 shows that the flagellate does not belong 

 to the genus Heteromita. These authors, 

 however, state that thev believe Heferoinifa 



A 



B 



Fig. 260. 



(A) Species of Helkesimastix Copkozoic in Goat and fSiiEEP Dung (x 2,250). 



(After Woodcock, 1921.) 

 ]. H. major ; 2 and 3, //. fcecicola. 



(B) Trimitus moteUce from the Eectum of the Marine Fish, Motella tricirrata 



(x 2,250). (After Alexeieff, 1910.) 



to be a synonym of Cercotnonas, so that it is highly probable that the 

 flagellate was C. longicanda occurring coprozoically in the faeces. 



Genus: Helkesimastix Woodcock and Lapage, 1915. 

 This genus was established by W^oodcock and Lapage (1915) for a 

 certain small flagellate which they encountered in cultures of goat's fseces. 

 The original description was corrected by Woodcock (1921). The flagel- 

 late resembles Cercotnonas in that it possesses two flagella, the axoneme of 

 one of which is adherent to the surface of the body as far as its posterior 



