NO. 2131. 



NEMATODE PARASITES OF RODENTS— HALL. 



55 



the sucker; the second pair is submedian and almost equidistant be- 

 tween the sucker and the cloacal aperture; the third pair is submedian 

 and is just anterior of the cloacal aperture ; the fourth and fifth pairs 

 are close together and lateral, the fifth being farthest from the median 

 line and sustaining the bursal membrane. The first and second pairs 



Fig. 60.— Subuluka bou- 

 ETi. Posterior ex- 

 tremity OF male; ven- 

 tral VIEW. Enlarg- 

 ed. After Gendre, 

 1911. 



Fig. 61.— Subulura boueti. Posterior extremity 

 OF male; lateral view. Enlarged. After 

 Gendre, 1911. 



of postanal papillae are large and submedian; the fifth and sixth 

 pairs are also submedian, but much smaller; the third and fourth 

 pairs are lateral, the third pair sustaining the lateral membrane and 

 the fourth pair being the smallest of all the papillae. There is a 

 single spicule, the right, and an accessory piece (fig. 62). The 

 spicule is strong, curved, and finely striate transversely. It is 980 [i 

 long and is composed of tvro distinct parts ; the short proximal part 

 is cylindrical and terminates in a funnel-shaped head, while the 

 longer distal part terminates in a point and is provided with two 

 lateral alae. The accessory piece is awl-shaped and abruptly en- 

 larged at the base. On its ventral face is a groove, along which the 

 spicule slides, formed by a simple depression on the side of the base 

 and by two small, flexible, membranous folds on the side of the point. 

 Female 15.52 to 18.78 mm. long and 600 to 640 n thick. Esophagus 

 is 1/7.6 to 1/8.4 and tail 1/11.9 to 1/13.8 of the total body length. 



