688 PROTOZOOLOGY 



C. floridensis M. About 230m by 89m; in Scaphiopus albus. 



Genus Protoopalina Metcalf. Cylindrical or spindle-shaped, cir- 

 cular in cross-section; 2 nuclei; in the colon of various species of Am- 

 phibia with one exception. Numerous species. 



P. intestinalis (Stein) (Fig. 294, f-i). About 330/x by 68m; in 

 Bombina bombina, and B. pachypa; Europe. 



P. saturnalis Leger and Duboscq (Fig. 294, j, k). In the marine 

 fish, Box boops; 100-152/x by 22-60m- 



P. mitotica (M) (Fig. 294, 1). 300m by 37m; in Amby stoma tigrinum. 



Genus Zelleriella Metcalf. Greatly flattened; 2 similar nuclei; all 

 in Amphibia. Numerous species. Cytology (Chen, 1948). 



Z. scaphiopodos M. In Scaphiopus solitarius; about 150m long, 90m 

 broad, 13m thick. 



Z. antilliensis (M). About 180m long, 113/z wide, 32/x thick; in 

 Bufo marinus. 



Z. hirsuta M. About 113m long, 60m wide, 22m thick; in Bufo cog- 

 natus. 



Z. elliptica Chen (Fig. 295). In Bufo valliceps; average dimensions 

 184^ by 91m- Chen (1948) distinguishes four other species from the 

 same host, all of which possess 24 chromosomes. 



References 



Butschli, O.: (1887-1889) Protozoa. In: Bronn's Klassen und 



Ordnungen des Thier-reichs. 1. 

 Doflein, F. and Reichenow, E. : (1929) Lehrbuch der Protozoen- 



kunde. 5 ed. Jena. 

 Kahl, A.: (1930-1935) Urtiere oder Protozoa. I. Wimpertiere oder 



Ciliata (Infusoria). In: Dahl's Die Tierwelt Deutschlands und 



der angrenzenden Meeresteile, etc. Parts 18, 21, 25, 30. 

 Kent, W. S. : (1880-1882) A manual of Infusoria. London. 

 Stein, F.: (1867) Der Organismus der Infusionsthiere. 2. 

 Stokes, A. C: (1888) A preliminary contribution toward a history 



of the freshwater Infusoria of the United States. J. Trenton 



Nat. Hist. Soc, 1:71. 



Beltran, E.: (1941) Opalinidos parasitos en anfibios mexicanos. 



Rev. Soc. Mexicana Hist. Nat., 2:127. 



(1941a) Zelleriella leptodeirae sp. nov., etc. Ibid., 2:267. 



Bhatia, B. L. and Gulati, A. N.: (1927) On some parasitic ciliates 



from Indian frogs, toads, etc. Arch. Protist., 57:85. 

 Carini, A.: (1938) Contribuicao ao conhecimento das "Opalinidae" 



dos batraquios do Brasil. II. Bol. Biol, N.S., 3:147. 



— (1938a) Zelleriella corniola, etc. Arch. Biol., 22:1. 



(1940) Contribuicao ao conhecimento das "Opalinidae" dos 



batraquios do Brasil. Ibid., 24, 5 pp. 



(1942) Sobre uma Zelleriella do cecum do Siphonops annula- 



tus. Ibid., 26, 2 pp. 



