826 PROTOZOOLOGY 



commensal in the intestine of Rhinoceros unicornis in Zoological 

 Garden in London. 



Genus Cochliatoxum Gassovsky. Adoral zone near anterior end; 

 3 additional zones, 1 antero-dorsal, 1 postero-dorsal and 1 postero- 

 ventral; macro nucleus with curved anterior end; in the colon of 

 horse. One species. 



C. periachtum G. (Fig. 352, b). 210-370/x by 130-210m (Hsiung, 

 1930). 



Genus Ditoxum Gassovsky. Large adoral zone near anterior end ; 

 2 dorsal (anterior and posterior) zones; macronucleus curved club- 

 shaped; in the colon of horse (Hsiung, 1935). 



D.funinucleum G. (Fig. 352, c). 135-203^ by 70-101/x. 



Genus Troglodytella Brumpt and Joyeux. Ellipsoid; flattened; 

 adoral zone ; 3 additional zones (anterior zone continuous or not con- 

 tinuous on ventral surface; posterior zone continuous on dorsal 

 surface; between them a small zone on each side); skeletal plates in 

 anterior region; macronucleus L-form; contractile vacuoles in 2 cir- 

 cles; in the colon of anthropoid apes. 



T. abrassarti B. and J. (Fig. 352, d-f). About 145-220/x by 120- 

 IGOyu; in the colon of chimpanzees (Brumpt and Joyeux, 1912). 

 Reichenow (1920) distinguished var. acuminata on the basis of the 

 drawn-out posterior end, which was found by Swezey (1932) to be a 

 variant of T. abrassarti. Cytology (Swezey, 1934); cultivation (Nel- 

 son, 1932; Swezey, 1935). 



T. gorillae Reichenow. 200-280/z by 120-160/*; in the colon of 

 gorilla; with anterior zone not reaching the right side. 



References 



Awerinzew, S. and Mutafowa, R,: (1914) Material zur Kenntnis 

 der Infusorien aus dem Magen der Wiederkauer. Arch. Protist., 

 33:109. 



Balech, E.: (1942) Tintinnoineos del Estrecho le Maire. Physis, 19: 

 245. 



— (1945) Tintinnoinea de Atlantida. Comm. Mus. Argent. 

 Cien. Nat. Ser. Cien. Zool., no. 7. 



(1951) Nuevos datos aobre Tintinnoinea de Argentina y Uru- 

 guay. Physis, 20:291. 



Becker, E. R. : (1933) Concerning Ehjtroplastron hegneri. Tr. Am. 

 Micr.Soc, 52:217. 



, Schulz, J. A. and Emmerson, M. A. : (1930) Experiments on 



the physiological relationships between the stomach Infusoria 

 of ruminants and their hosts. Iowa State College J. Sc, 4:215. 



and Talbott, Mary: (1927) The protozoan fauna of the 



rumen and reticulum of American cattle. Ibid., 1:345. 



