NO. 2131. 



NEMATODE PARASITES OF RODENTS— HALL. 



13V 



along their proximal portion (fig. 177). They are curved at the 

 tip. When extruded the spicules bend around in a wide curve, the tips 



fintce/Aart/er 



174. 



175. 



Figs. 174, 175.— Nematodirus NEOTOM.4. 174, Bxjesa, dorso-lateral view. X 170. 175, Bursa, lat- 

 eral VIEW, i, Dorsal rays; ei., extekno-dorsal r.vys; fZ., externo-lateral rays; Iv., latero- 

 ventral ray; to?., medio-lateral rays; pL, postero-lateral rays; .?pKr., spicule; v., ventro-ven- 



TRAL RAY. X 170. 



coming back toward the ventral surface or even to it. No prebursal 

 papillae found. 



Female 18.3 to 22.2 mm. long with a maximum thickness at the 

 vulva of about 225 y.. The tip of the tail is truncated and bears a 



/en/riff/Aan/er //a/^/6on/er 



176. 177. 



Figs. 176,167.— Nematodirusneotom a. 176, Bursa, ventral view, i., Dorsal ray; j;.,the ventral 



RAY systems formed BY THE CLOSELY APPROXIMATED LATERO-VENTRAL AND VENTRO-VENTRAL RAYS. 



X 170. 177, Posterior extremity of male, int., Intestine, x 46. 



pointed spinelike process (fig. 178). The anus is about 120 ^u, from 

 the posterior end of the body. The vulva (fig. 179) is situated at the 

 union of the middle and posterior thirds of the body or slightly in 



