NO. 2131. 



NEMATODE PARASITES OF RODENTS— HALL. 



53 



Female attains a maximum length of 19 mm. and a thiclmess of 

 1 mm. Tail "with the terminal spine continuous and scarcely dis- 

 tinct " (fig. 58) . Vulva not located. Ova nearly spherical, 50 to 63 p. 

 in diameter, and containing coiled embryos when oviposited. 



Host. — Sciurus species. „ 5 



L ocation. — Cecum. 



Locality. — Northeast India. 



The presence of embryos in the egg 

 when oviposited, as well as the site of 

 infestation, indicate clearly that this is 

 not a species of Ascaris, as Cobbold 

 made it. Eailliet and Henry have 

 tentatively assigned it to the genus 

 Suhulura, and despite the fact that the 

 evidence is quite incomplete in impor- 

 tant respects, it still seems sufficiently 

 likely to warrant placing it there 

 rather than leaving it in a genus in 

 which it obviously does not belong. 



Cobbold's statement that the worm 

 has a simple head has been used in the key to differentiate this species 

 from the following, but Cobbold's study of his species was not ade- 

 quate for proper description, and it can not be taken too seriously. 

 The worm may or may not have lips. 



Fig. 58.— Subulura andersoni. Pos- 

 terior EXTREMITY OF THE MALE (o) 

 AND OF THE FEMALE (6). ENLARG- 

 ED. After Cobeold, 1876. 



SUBULURA UNCINATA (Rudolphi, 1819) Hall, 1916. 



Synonyrm. — Ascaris uncinata Rudolphi, 1819; Ileterakls uncinata 

 (Rudolphi, 1819) Schneider, 1866. 



Specific diagnosis. — Subulura (p. 52) : Mouth with three lips. 

 Lateral membrane begins one-third of the length of the body from 

 the head. 



Male 13 mm. long. Tail ends in an attenuate imciniform apex 

 (fig. 59). Bursa very little developed. There are five pairs of 

 preanal papillae, of which one pair is adjacent to the sucker, three 

 pairs close to the cloacal aperture, and one pair about halfway be- 

 tween the cloacal aperture and the sucker. There are six pairs of post- 

 anal papillae. One pair of preanal and one pair of postanal papillae 

 are large and prominent. The sucker is fusiform and, judging from 

 this shape and from Schneider's figure, is without a chitinous ring. 



Female. — 16 mm. long. Tail straight and sharp. 



Hosts. — Cavia aperea {Cavia aperia), Cuniculus paca {Agouti 

 paca) . 



Location. — Cecum. 



Locality. — Brazil. 



