NEMATODE PARASITES OF BIRDS 



289 



specific name, only the 2 processes shown in profile at the sides of the 

 body being observed by the earlier authors (Rudolphi and Dujardin). 

 Mouth cilp-shaped, with 4 papillae. Lepri says that these papillae 

 are situated on a lip which surrounds the mouth and which can be 

 retracted into the mouth. Mouth opens into long thin-walled vesti- 

 bule ; esophagus in 2 parts. 



Male 6.75 to 10 mm. long. Posterior extremity rolled twice in 

 spiral ; alae wide, oval. Lepri says there are 4 pairs of preanal and 



35Z 



Figs. 350-353. — 350, Sciiistorophus acanthocepiialicus. Head. After .Diuschk, 

 1884. 351, schistobophos aulieatina. head end. after skejabin, 1916. 

 352, schistoeophus bidens. male tail. after schneider, 1866. 353, 

 schistobophus bidens. a, head; b, male tail. after lepri, 1898 



2 pairs of postanal pedunculated papillae (fig. 353 b) but Schneider 

 describes and figures 10 pairs in all (fig. 352). 



Female 12 to 19 mm. long. Tail ending in a short, recurved 

 point anterior to which is the anus. Vulva bilabiate, the lips large 

 and projecting, situated posterior to (lit! middle of the body; accord- 

 ing to Schneider mm. from the posterior end in a speciman 15 mm. 

 long. Eggs 43/x long by 19/* wide. 



Life history. — Unkown. 



Distribution. — Europe (Austria (Museum, Vienna) ) and Italy 

 (Province of Rome). 



The cup-shaped head, the presence of the processes at the neck 

 and anteriorly directed instead of on the head and posteriorly di- 

 rected, are different from those of other species of Schistorophus and 

 make the status of this species questionable. 



