HOLOTRICHA 607 



C. piriforme da C. (Fig. 287, /). Typical form inverted pyriform; 

 second form conical with tapering anterior end; contractile vacuole 

 posterior; 30-40jli by 20-30^; in the caecum of Cavia aperea and C. 

 porcella. Lucas (1932) who made a cytological study of the organism, 

 found some 52 per cent of guinea pigs which she examined in Phila- 

 delphia and St. Louis harboring this ciliate. 



Family 14 Blepharocoridae Hsiung 



Genus Blepharocorys Bundle. Oral groove deep, near anterior end; 

 3 (oral, dorsal and ventral) ciliary zones at anterior end; a caudal 

 ciliary zone; in the caecum and colon of horse or stomach of cattle. 

 Many species. 



B. uncinata (Fiorentini) {B. equi Schumacher) (Fig. 287, g). With 

 a screw-like anterior process; 55-74^ by 22-30m; in the caecum and 

 colon of horse. 



B. hovis Dogiel (Fig. 287, h). 23-37)u by 10-17^; in the stomach of 

 cattle. 



Genus Charon Jameson. Two caudal ciliary zones; in the colon of 

 horse or in stomach of ruminants. 



C. equi Hsiung (Fig. 287, i). 30-48m by 10-14m; in the colon of 

 horse. 



References 



Johnson, W. H. and F. R. Evans 1939 A study of encystment in 

 the ciUate, Woodruffia metabolica. Arch. f. Protistenk., Vol. 92. 



■ 1940 Environmental factors affecting cystment in 



Woodruffia metabolica. Physiol. Zool., Vol. 13. 



1941 A further study of environmental factors af- 



fecting cystment in Woodruffia metaholica. Ibid., Vol. 14. 

 Lackey, J. B. 1925 The fauna of Imhoff tanks. Bull. N. J. Agr. 



Exp. Stat., No. 417. 

 Lucas, Miriam S. 1932 A study of Cyathodinium piriforme. Arch. 



f. Protistenk., Vol. 77. 

 Lynch, J. 1929 Studies on the ciliates from the intestine of Stron- 



gylocentrotus. L Univ. Calif. Publ. Zool., Vol. 33. 



1930 II. Ibid., Vol. 33. 



Powers, P. B. A. 1933 Studies on the ciliates from sea urchins. 



I, II. Biol. Bull., Vol. 65. 

 1935 Studies on the ciliates of sea urchins. Papers from 



Tortugas Lab., Vol. 29. 

 Taylor, C. V. and W. H. Furgason 1938 Structural analysis of 



Colpoda duodenaria sp. nov. Arch. f. Protistenk., Vol. 90. 

 and A. G. R. Strickland 1939 Reactions of Colopoda 



duodenaria to environmental factors. II. Factors influencing the 



formation of resting cysts. Physiol. Zool., Vol. 12. 

 Wenrich, D. H. 1928 Eight well-defined species of Paramecium. 



Trans. Amer. Micr. Soc, Vol. 47. 



