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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 87 



the posterior end appearing as if cut off at tlie tip. The protoplasm 

 at the posterior end is less dense and highly vacuolated. These 



I! 



Figure bi.—ZeUerieUa truncata Carini from Leptodactylus ocellatus. (After Carini.) 



animals measure 80-150/^ in length and 45-65/li in width. The two 

 nuclei located in the middle of the body are spherical, measuring 

 10-12/1 in diameter. (A restudy of this species is desirable.) 



ZELLERIELLA BOIPEVAE Carini 



Figure 55 



Host: A snake, Ophis meremmii (Wagler), from Brazil. 



This species of Zelleriella was found in considerable number in the 

 terminal portion of the intestine of the snake. These opaUnids are 

 irregularly oval in shape, the anterior part of the body being a little 

 thinner than the posterior part. They measure 100-150/i in length 

 and 60-90)u in width. The body is flattened and has a thickness of 

 25-35)U. There is a narrow zone of ectoplasm. The endoplasm is 

 vacuolated and contains many endospherules. Two spherical nuclei, 



FiGUEK 55.— Zelleriella boipevae Carini from Ophis meremmii, X ca* 335. (After Carini.) 



