ZOOMASTIGINA, RHIZOMASTIGINA 267 



fiber runs from it to anterior end and continues into the flagellum; 

 without contractile vacuole; division in spherical cyst. 



R. gracilis A. (Fig. 114, /). 8-14)u long; flagellum 20/i long; in 

 intestine of axolotles and tipulid larvae. 



References 



Becker, E. R. 1925 The morphology of Mastigina hylae (Frenzel) 

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Bishop, Ann 1938 Histomonas meleagridis in domestic fowls (Gal- 

 lus gallus). Cultivation and experimental infection. Parasitol- 

 ogy, Vol. 30. 



DoBELL, C. 1940 Research on the intestinal Protozoa of monkeys 

 and man. X. Ibid., Vol. 32. 



Lemmermann, E. 1914 Pantostomatinae. Siisswasserflora Deutsch- 

 lands, etc. H.L. 



Tyzzer, E. E. 1919 Developmental phases of the protozoon of 

 "blackhead" in Turkeys. Jour. Med. Res., Vol. 40. 



Wenrich, D. H. 1943 Observations on the morphology of His- 

 tomonas from pheasants and chickens. Jour. Morph., Vol. 72. 



