620 FAMILY: CHILOMASTIGID^ 



EMBADOMONAS IN ANIMALS. 



Embadomonas wenyoni (Foiiseca, 1917). — This form closely resembles 

 E. intestinalis of man, with which it may be identical. It was described 

 by Fonseca (1917) as Waskia wenyoni, and was found in the caecum of 

 the Brazilian monkey, Cebus carya. The description referred to the 

 spherical dividing forms, which have two sets of flagella and two cyto- 

 stomes. They correspond 'u\ every way with the dividing stages of 

 E. intestinalis. 



E. agilis Mackinnon, 1911.- — This flagellate was discovered by Mac- 

 kinnon (1911, 1915) in tipulid and trichoi^teran larvae. It varies in size 

 from 4 to 1-5 microns to 11 by 3 microns. The cysts measure 3-5 to 4 

 by 4 by 3 microns. 



E. alexeieffi Mackinnon, 1911. — This form, which is slightly larger than 

 the preceding one, occurred only in tipulid larvae. It measured 7 to 16 

 by 5 to 9 microns, while the cysts measured 5 to 6 by 4 to 5 microns. The 

 cysts of this and E. agilis are described and figured as being ovoid in shape, 

 with no tendency to a narrowing of the anterior end, as not infrequently 

 occurs in those of E. intestinalis. 



E. belostomae (Brug, 1922). — Brug (1922) records as Waskia belostonicea 

 an Embadomonas which he found in the water bug, Belostoma sp., in Java, 

 It actually shows no specific differences from other species which have 

 been described. 



A flagellate of the genus Embadomonas has recently been seen by the 

 writer in the intestine of a tortoise {Testudo argentina) which died in the 

 Zoological Gardens in London (Fig. 11). Structurally, it did not differ 

 from E. intestinalis, but w^as distinctly larger, as it varied in length from 

 12 to 19 microns. Encysted forms were not seen. It was successfully 

 cultivated. A form having the same dimensions was discovered by the 

 writer in the rectum of an English frog. A culture was obtained, and in 

 this the characteristic cysts resembling those of E. intestinalis were 

 produced. 



6, Family: CHILOMASTIGID^, 

 This family includes flagellates which have three anteriorly directed 

 flagella, and one posteriorly directed one which lies in a long cytostomal 

 cleft. Characteristic oval or pear-shaped cysts are produced, within which 

 the single nucleus and the cytostomal cleft can be distinguished. It 

 includes the single genus Chilomastix. The genus Tetrachilomastix, which 

 was founded by Fonseca (1916) for flagellates having the Chilomastix 

 structure, except the possession of four anterior flagella instead of three, 

 is not free from doubt. 



