NEW GENERA AND SPECIES OF NEMATODE WORMS 



By Asa C. Chandler 

 Of ilie Riice Institute, Houston, Tex. 



This paper contains descriptions of several new genera and species 

 of parasites collected from Asian and American vertebrates. One 

 species, B our gelatio ides traguU, new genus, new species, belongs to 

 the suborder Strongylata, while the others all belong to the suborder 

 Spirurata. One of the latter, Filarlopsis Ofrator., has been placed in 

 a new famil}^, Filariopsidae. 



BOURGELATIOIDES, new genus 



Generic diagnosis. — Oesophajiostominae : Mouth capsule cylindri- 

 cal, shallow, with thick chitinous walls, divided into anterior and 

 posterior compartments. Posterior end of capsule attached to the 

 cuticle by a chitinous ring and anterior portion of capsule separated 

 from posterior portion by a crown of small leaflets. Anterior border 

 of capsule without leaf-crown, but with four large papillae in the 

 wall. Head end of body delimited in esophageal region by a groove 

 and an overlying flap of cuticle entirely encircling the body. Bursa 

 well developed, the large dorsal ray split for about half its length, 

 each branch again bifurcated; externodorsal very large; posterolat- 

 eral and mediolateral closely approximated; ventrals closely approx- 

 imated but split almost to the common base. Spicules equal, moder- 

 ately long, winged, each terminated by a long coiled filament. Vulva 

 in posterior part of body. Tail of female bluntly conical, ending in 

 a sharp point. 



Type species. — Bourgelatioides traguli.^ new species. 



In many respects the worm for which this genus is erected re- 

 sembles Bourgel^tia., the single species of which was described from 

 the intestine of pigs in Annam by Railliet, Henry, and Bauche 

 (1919), but it differs in lacking an anterior leaf-crown and in other 

 details of the mouth capsule, in the presence of a groove and over- 

 lying flaps in the cervical region, and in the prcvsence of terminal 



No. 2866.— Proceedings U. S. National Museum, Vol. 78, Art. 23 



2.3922—31 1 



