550 PROTOZOOLOGY 



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

 in Amphibia. Numerous species. 



Z. scajphiopodos M. (Fig. 262, h). In Scaphiopus solitarius; about 

 150^1 long, 90/x broad, 13/i thick. 



Z. antilliensis (M). About 180/i long, 113)u wide, 32/i thick; in 

 Bufo marinus. 



Z. hirsuta M. About 113/i long, 60^1 wide, 22/i thick; in Bufo cog- 

 natus. 



Z. intermedia M. (Fig. 64). About 94^ by SO/x by 16^; in Bufo 

 intermedicus and B. valliceps. 



References 



BtJTscHLi, O. 1887-1889 Protozoa. In: Bronn's Klassen und Ord- 



nungen des Thier-reichs. Vol. 1. 

 DoFLEiN, F. and E. Reichenow 1929 Lehrbuch der Protozoen- 



kunde. Jena. 

 Kahl, a. 1930-1935 Urtiere oder Protozoa I: Wimpertiere oder 



Ciliata (Infusoria). In Dahl: Die Tierwelt Deidschlands und der 



angrenzenden Meeresteile nach ihren Merkmalen und nach ihrer 



Lebensweise. Parts 18, 21, 25, 30. 

 Kent, W. S. 1880 to 1882 A manual of Infusoria. 

 Stein, F. 1867 Der Organismus der Infusionsthiere. Vol. 2. 

 Stokes, A. C 1888 A preliminary contribution toward a history of 



the fresh-water Infusoria of the United States. Jour. Trenton. 



Natural Hist. Soc, Vol. 1. 



Metcalf, M. M. 1923 The opalinid ciliate infusorians. Smith- 

 sonian Inst. U. S. Nat. Museum, Bull., No. 120. 



1940 Further studies on the opalinid ciliate infusorians and 



their hosts. Proc. U. S. Nat. Mus., Vol. 87. 



