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VOL. 50. 



that it does not even belong in the Strongyloidea. Further study 

 and description of the material seems to be necessary. It would have 

 added to the value of Parona's (1909) paper if he had labeled his 

 figures; drawings are not always self-evident. 



135. 



136. 



Figs. 135-137.— Uncestaelv mukidis. 135, Anterior extremity. Enlarged. After Parona, 1909. 

 136, Spicule. Enlarged. After Paeona, 1909. 137, Posterior extremity of female, ventral 

 VIEW. Enlarged. After Parona, 1909. 



Tribe BUNOSTOMEAE Railliet and Henry, 1909&. 



SynGTiym. — Bunostominae Looss, 1911. 



Tribe diagnosis. — Strongylinae (p. 107) : Ventro-ventral and latere - 

 ventral rays close together and parallel. Medio-lateral and postero- 

 lateral rays not close together and not parallel. Dorsal and externo- 

 dorsal rays originate in a common trunk, the dorsal ray ending in 

 a bifurcation. The vulva is in the middle of the body or a little 

 anterior of this, and the uteri are divergent. 



Type-genus. — Bunostomuin Ttailliet, 1902. 



Genus ACHEILOSTOMA Leiper, 1911. 



Generic diagnosis. — Bunostomeae (p. 112) : Buccal capsule opens 

 slightly dorsally, the aperture unarmed (fig. 138). At the base of the 

 buccal capsule a large ventral tooth and two fan-shaped dorsal teeth 

 (fig. 139). No corona radiata. Dorsal lobe of bursa very distinct 

 and shorter than the lateral lobes. Genital cone prominently de- 

 veloped. The main trunk of the dorsal ray branches to form the 



