628 FAMILY: CHILOMASTIGID^ 



lohengula) and the rat (Rattns concha) of South Africa. C. caprce Fonseca, 

 1915, is a very similar form found in the rumen of goats (Capra Jiircvs). 



C. cuniculi Fonseca, 1915, occurs in the caecum of rabbits {OryctoJagus 

 cuniculus). The form named C. cuniculi var. rossica by Yakimoff, 

 Wassilewsky, Korniloff, and ZwietkofE (1921) is unquestionably identical 

 with C. cuniculi. 



C. rosenbuschi Fonseca, 1916, occurs in the intestine of the viscacha 

 {Lagostoynus 7naximus), a South American rodent, and C. intestinalis 

 Kuczynski (1914) in the guinea-pig {Cavia jjorcellus). The latter is fairly 

 commonly present in guinea-pigs in England. Chalmers and Pekkola 

 (1918) recorded the occurrence of a Chilomastix in the gerbil {GerhiUus 

 pygurthus) of the Sudan. Bach (1923) has seen the cysts and free forms 

 of a Chilomastix in a monkey, Macacus rhesus, and Hegner (1924) the cysts 

 in another monkey, Cebus apella. Species of Chilomastix occur in other 

 hosts than mammals. Thus, Alexeieff (1909) described C. caulleryi from 

 the intestine of tadjjoles, axolotls, and salamanders. A form, probably 

 C. caulleryi, was seen by Fantham (1922) in the South African clawed toad 

 {Xenopus IcBvis). Alexeieff (1910) also saw a flagellate of the same type 

 in the marine fish, Motella tricirrata and M. inn stela. He (19126) gave it 

 the name C. motellw, while another form which he saw in the|fish. Box 

 salpa, he identified with the human C. 7nesnili. Brumpt (1912a), however, 

 regarded it as a distinct species, and gave it the name C. hocis. Martin 

 and Robertson (1911) mention the occurrence of a species of Chilomastix 

 in the intestine of the coal fish {Gadus virens). The writer (1921) recorded 

 Chilomastix sp., a small form from the gut of two Egyptian lizards, Lacerta 

 agilis and Agamci, stellio, and he has since seen similar forms in films made 

 by Chalmers and Pekkola of the intestinal contents of the gecko, Tarentola 

 annulurus of the Sudan. Belar (1921a) has described as C. aulastomi a 

 species which occurs in the hind-gut of the horse leech, Aulastomum gulo. 

 It is possibly this form which Alexeieff (1910)-records as having been seen 

 by Chatton in Hcemopsis sanguisuga. The writer has seen a flagellate, 

 probably C. caulleryi, in the common English toad. Both free and 

 encysted stages occurred. 



Under the name of C. gallinarum, Martin and Robertson (1911) de- 

 scribed a flagellate from the caecum of fowls (Fig. 265, A). According to 

 their description, there were four anterior flagella, but no mention is made 

 of one within the cytostomal cleft. Fonseca (1916) created the genus 

 Tetrachilomastix for flagellates of this type, and later (1920) states that 

 there is a fifth flagellum within the cytostome. The chicken parasite 

 would then become T. gallifiarum, differing from species of Chilomastix in 

 having four instead of three anterior flagella. The encysted stages are 

 similar to those of species of Chilomastix. The writer has studied the 



