SCLEROSTOMA STRUTHIONIS. 263 



NOTE XXIV. 



A NEW ENTOZOON 

 PROM STRUTHIO MOLYBDOPHANES , RCHW. 



DESCRIBED BT 



Dr. R. HORST. 



Sclerostoina Struthionis , n. sp. 

 (Plate 8). 



Examiuing the intestinal tract of a female of Struthio 

 molyhdophanes Rchw., died in the Zoological garden at Rot- 

 terdam , I found in both the coeca a large number of 

 Nematoids, which I believe to represent a new species, 

 belonging to the genus Sderostorna Rud. The parasite is 

 characterized as follows: 



Body cylindrical , transversely striated , slightly narrowed 

 in front, attenuated gradually towards the posterior extre- 

 mity, with two narrow lateral-membranes. Anterior part 

 of the head surrounded by au annular wall. Buccal cap- 

 sule with a single row of stiif cilia, surrounding the mouth 

 and a longitudinal furrow along the middle of the dorsal 

 side. The sub-mediau oral papillae are conical, the lateral 

 ones spade-shaped. Two small, pointed neck-papillae about 

 the middle of the oesophagus. The caudal extremity of 

 the male bent backwards and furnished with a trilobed bursa, 

 consisting of two broad , rather polygonal , lateral lobes 

 and a narrower, pear-shaped dorsal one. Each posterior 

 ray bears at its base two short secondary branches, of 

 which the external is somewhat longer than the internal. 



Notes from the Ley den Mluseuni, Vol. "VII, 



