NO. 2131. 



NEMATODE PARASITES OF RODENTS— HALL. 



77 



latter connection it may be noted that the cement glands in the tails 

 of Strongylus give rise to prominent vulvar plugs. 



87. 88. 



Figs. 87, 8S.— Oxyueis hilgekti. 87, Genitaua of immature female. After Seueat, 1915. a. 

 Ovary; r, eeceptaculum seminalis; /, musculo-epithelial ovijector; «, uterus; y, vagina. 8S, 

 Exceptional arrangement of terminal genitalia in female. After Seurat, I'Jiri. 



Seurat (1915r/) extended his original description of this species 

 in a later paper. It might be noted in passing that the name of the 

 parasite is marked " n. sp." in both cases, 

 a not uncommon thing but nevertheless 50 ^• 



one which is very misleading and a thing 

 which writers should guard against in 

 the interests of accuracy. 



OXYURIS FLAGELLUM Hemprich and Ehrenberg. 

 1828. 



-OXYURIS HILGERTI. 



After Seurat, 1915. 



Synonym. — Oxyuris f.ahellurrh Ehrb. 

 of Nassonov, 1898 (reviewer's error). 



Speci'flc diagnosis. — Oxyuris (p. 65) : Mouth without papillae, its 

 aperture almost hexagonal, formed by six bilaterally symmetrical 

 scallops. The tail equals a third or more of the body length. The 



