TWO NEW NEMATODES OF THE FAMILY STRONGYL- 

 IDAE, PARASITIC IN THE INTESTINES OF MAMMALS 



By Benjamin Schwartz 

 Zoologist, Bureau of Animal Industry 



The first parasite described in this paper was collected by Dr, 

 E. W. Price, of the Bureau of Animal Industry, in the course of a 

 post-mortem examination of a wart hog {Phacochoerus aethiopicus- 

 nnassaieus) which was received at the National Zoological Park, 

 Washington, D. C, on October 26, 1926, and which died June 6, 

 1927. The worms, which represent a new genus and species, were 

 found in the large intestine in association with three species of the^ 

 nematode genus Oesophagostotnmn as follows: O. miomisae, O. ewm/- 

 cephcdimi, and O. yorkei. 



PHACOCHOEROSTRONGYLUS, new genus 



Strongtlidae. — The mouth is directed straight forward. There 

 are four submedian and two lateral cephalic papillae. An external 

 and an internal leaf crown are present. The buccal capsule is rather 

 shallow and cylindrical in shape. The esophagus is club-shaped. 

 Male bursa with two lateral lobes and a well-developed dorsal lobe. 

 Ventro-vontral and latero-ventral rays short, parallel, and close 

 together; externo-lateral, medio-lateral, and postero-lateral rays 

 originate from a common trunk, the last two being parallel and close 

 together, the externo-lateral ray diverging from them. Externo- 

 dorsal and dorsal rays arise from a common trunk. Dorsal ray with 

 a pair of branches anterior to its cleft. Each of the terminal 

 branches of the dorsal ray with one small or rudimentary accessory 

 branch. Spicules slender, filiform, and sheathed. Gubernaculum 

 present. Vulva and anus very close together. The terminal portion 

 of the female bent dorsad. Vagina relatively long, communicating 

 on each side with an ovejector, the ovejectors and uteri being paralleL 



PHACOCHOEROSTRONGYLUS PRICEI, new species 



The head (fig. 1) is separated from the rest of the body by a well 

 defined transverse constriction. The buccal capsule is supported by 

 chitinous walls whose appearance in optical section is shown ins 

 Figure 1. The external leaf crown consists of 10 elements which 

 are long and pointed; the internal leaf crown consists of about 24 



No. 2723.— Proceedings U. S. National Museum, Vol. 73, Art. 2. 



77067—28 1 



