OPALINID CILIATE HJTFUSORIANS — METCALF 

 ZELLERIELLA FOUACEA Carini 



Figure 53 



497 



Host: Leptodactylus ocellatus (Linnaeus), from Brazil. 



This species of Zelleriella has an irregular, round outline. The 

 body is very thin, having the appearance of a leaf. The body some- 

 times shows longitudinal folds. It resembles Z. leptodadyli Metcalf 

 (1923a), which is much smaller. The majority of the animals belong- 



FiGUEE 53.— ZelUrieUa foliacea Carini from Leptodactylus ocellatus. (After Carini.) 



ing to Z. foliacea measure 200jli in diameter; some of them are over 

 300/i. The two spherical nuclei measure 25fi in diameter. Eight nu- 

 cleoU have been observed in this species. 



ZELLERIELLA TEUNCATA Carini 



Figure 54 



Hosts: Leptodactylus ocellatus (Linnaeus) and L. sibilatrix (Wied), 

 from Brazil. 



This species of Zelleriella is truncate in shape. These animals are 

 found only rarely and almost always with other Zelleriellas that are 

 regularly oval in shape. The anterior end of Z. truncata is rounded, 



166877— 4C 



