PROSOPEAS. 33 



straight, the right margin arcuate above. Length 15, diam. 

 4, aperture 4.5x2 mm. (Blanf.). 



Nilgiri Mts. 



Spiraxis hebes W. & H. BLANF., Contrib. to Indian Malac., 

 no. 2, 1861, p. 15, pi. 1, f. 15, in Journ. Asiatic Soc. Bengal, 

 xxx, 1861, p. 361. PFR., Monogr., vi, p. 190. HANL. & 

 THEOB.., Conch. Indica, pi. 79, f. 10. 



The above are the dimensions of the largest specimen found. 

 It may be easily distinguished from 8. gracilis, the only re- 

 lated Indian species, by its very obtuse apex, less numerous 

 whorls, etc. 



30. P. ANCEYI Pilsbry, n. n. PI. 6, figs. 72, 73. 



Shell fragile, subpellucid, glossy, subulate, very narrowly 

 and almost vertically subrimate; under a lens, sculptured 

 with close and arcuate growth-striaa. Spire long, gradually 

 tapering, the apex obtuse, quite large and smooth. "Whorls 

 10, plano-convex, rather rapidly increasing, separated by an 

 impressed, very minutely and regularly crenulated suture. 

 Last whorl cylindric-oblong, tapering basally, hardly ascend- 

 ing. Aperture vertical, oblong, narrowed above and below, 

 the base receding. Columella slightly arcuate, a little thick- 

 ened, reaching to the base of the aperture, scarcely truncated. 

 Columellar margin lengthened and narrowly dilated above the 

 rimation. Lip acute, rounded and produced in front. Color 

 pale grayish-corneous. Length 15.25, diam. 3.25, aperture 

 4x2 mm. (Ancey). 



Bac-Kan, Tonquin (Messager). 



Prosopeas macilentum ANCEY, Journ. de Conchyl., 1903, p. 

 220, pi. 9, f. 23, 24. Not of Reeve. 



This species is especially remarkable for its subulate, 

 greatly lengthened form. The name proposed by Mr. Ancey 

 is preoccupied for a Philippine species. 



31. P. HENRICI (Ancey). PI. 4, figs. 14, 15. 



Shell very long, produced-turrited, thin, pale corneous, 

 with a somewhat oily gleam, scarcely perforate; provided 

 with flexuous growth-strias which are arched forward below 



