SPIROTRICHA, HETEROTRICHA 651 



References 



Andrews, E. A. 1921 American Folliculinas : taxonomic notes. 



Amer. Nat., Vol. 55. 

 1942 A folliculinid at Beaufort, North Carolina. Trans. 



Amer. Micr. Soc, Vol. 61. 



1944 FolliculiniH Protozoa on North American coasts. 



Amer. Miclland Natural., Vol. 31. 

 Balamuth, W. Studies on the organization of ciliate Protozoa. 



1941, Jour. Morph., Vol. 68; 1942, Jour. Exper. Zool., Vol. 91. 

 Hegner, R. 1934 Specificity in the genus Balantidium based on 



size and shape of body and macronucleus, with description of 



six new species. Amer. Jour. Hyg., Vol. 19. 

 Kahl, a. 1932 Urtiere oder Protozoa. In Dahl's Die Tierwell 



Deutschlands. Part 15. 

 Kidder, G. W. 1937 The intestinal Protozoa of the wood-feeding 



roach Panesthia. Parasitology, Vol. 29. 

 KiRBY Jr., H. 1934 Some ciliates from salt marshes in California. 



Arch. f. Protistenk., Vol. 82. 

 Kudo, R. R. 1936 Studies on Nydotherus ovalis Leidy, with special 



reference to its nuclear structure. Ibid., Vol. 87. 

 and P. A. Meglitsch 1938 On Balantidium praenucleatum 



n.sp., inhabiting the colon of Blatta orientalis. Ibid., Vol. 91. 

 Levine, N. D. 1940 The effect of food intake upon the dimensions 



of Balantidium from swine in culture. Amer. Jour. Hyg., Vol. 32. 

 McDonald, J. D. 1922 On Balantidium coli (Malmsten) and B. 



suis (sp. nov.). Uni. Calif. Publ. Zool, Vol. 22. 

 Powers, P. B. A. 1935 Studies' on the ciliates of sea urchins. Papers 



from Tortugas Lab., Vol. 29. 

 ScHMAHL, O. 1926 Die Neubildung des Peristoms bei den Teilung 



von Bursaria truncatella. Arch. f. Protistenk., Vol. 54. 

 Stevens, N. M. 1903 Further studies on the ciliate Infusoria, 



Licnophora and Boveria. Ibid., Vol. 3. 

 Strong, R. P. 1904 The clinical and pathological significance of 



Balantidium coli. Bur. Gov. Labs. Manila, Biol. Lab., Bull. No. 



26. 



