60 



BULLETIN - U0, UNITED STATES NATIONAL MUSEUM 



Male 7.8 mm. long by 290/x, wide. Esophagus 1/8.5, tail 1/42, of 

 total body length, the latter (fig. 79) with a styloid prolongation at 

 its posterior end. Preanal sucker 180/* in diameter. Caudal alae 

 broad. Two long pedunculated papillae on each side of sucker; in 

 addition 4 pairs just anterior to the cloacal aperture, and 4 pairs sit- 

 uated more posteriorly. Spicules equal, 440//. long. 



Female 11.6 mm. long by 290//, wide. Tail long and pointed, 

 1/15 of total body length. Vulva posterior to middle, dividing body 

 in ratio of 19 :14. Eggs 70/x long by 44/x wide. 







© 



Figs. 75-78. — Heterakis rreyispiculum. 75, Male tail. 7G, 

 Spicule. 77, Region of sucker. 78, Heterakis gallinae. 

 Region of sucker. All after Gendre, 1911 



Life history.— Probably similar to that of H. gallinae (p. 54). 

 Distribution. — Europe (Germany (Zoological Museum, Koenigs- 

 berg) ). 



HETERAKIS CHENONETTAE Johnston, 1912 



Host. — G henonetta jubata. 



Location. — Ceca. 



Morphology.— Heterakis (p. 50) : Anterior end tapering rather 

 rapidly; posterior extremity pointed. Lips equal, small. 



Male 6.8 mm. long by 190/* wide. Caudal alae prominent, with 9 

 pairs of papillae (fig. 80), of which 4 are preanal (3 just anterior 



