ART. 2 NEW PARASITIC NEMATODES SCHWAETZ" i5 



externo-dorsal rays, all the rays reach the margin of the bursa. The 

 dorsal ray is cleft anterior to its middle, the two terminal branches 

 being about 152/a long. Each terminal branch gives off an accessory 

 branch slightly posterior to its point of origin from the main stem 

 of the dorsal ray. The spicules are slender, alate, about 780ja long. 

 The gubernaculum is more or less pear-shaped. 



Female. — The female is from 12 to 15 mm. long by about 495/a in 

 maximum width, some specimens being more slender. The esopha- 

 gus is from about 620ju, to 695/i, long by 138/a to 144/x, in maximum 

 width. The nerve ring is located approximately at the beginning 

 of the fifth ninth of the oesophagus. The vulva (fig. 1) has prom- 

 inent lips and is located at a distance of 190 to 228|a from the anus. 

 The vagina is about 230/a long. The ovejectors are about 265ju, long. 

 The tail is from 90/* to 105/a long, its terminal portion being slender 

 and blunt. 



Host. — Common wombat {Phascolorivys initchelli). 



Location. — Large intestine. 



Locality. — National Zoological Park, Washington, D. C. 



Type specimens. — No. 27198, U.S.N.M. 



Parafypes.— No. 19180, U.S.N.M. 



EXPLANATION OF PLATES 



a., anus; c. p. cervical papillae; d., dorsal ray; e. d., extenio-dorsal ray; 

 e. I., externo-lateral ray ; g., gubernaculum ; int., intestine ; I. c, leaf crown 

 element ; I. p., lateral-papilla ; /. v., latero-ventral ray ; m. I., medio-lateral 

 ray ; n. r. nerve ring ; oes., esophagus ; ovj., ovejector ; p. I. postero-lateral ray ; 

 sp., spicule ; s. p., submedian papilla ; t. d., terminal branch of dorsal ray., ut., 

 uterus ; vg., vagina ; v. and vl., vulva ; v. v., ventro-ventral ray. 



P14ATE 1 



Phacochoerostrongylus pricei, nev? genus and species. Fig. 1, anterior por- 

 tion of body ; Fig. 2, externo-dorsal and dorsal ray ; Fig. 3, posterior portion 

 of male; Fig. 4, posterior portion of female (lateral view) ; Fig. 5, externo- 

 dorsal and dorsal rays ; Fig. 6, male bursa ; Fig. 7, posterior portion of female. 



Plate 2 



Oesophagostomoides giltneri, new genus and species. Fig. 1, posterior portion 

 of female; Fig. 2, top view of head; Fig. 3, posterior portion of male (ventral 

 view) ; Fig. 4, posterior portion of male (lateral view) ; Fig. 5, anterior por- 

 tion of body. 



o 



