74 PLACOSTYLUS, NK\V HEBRIDES. 



fold. He proposes a subgenus Pcecilocharis for the species. The 

 doubling of the terminal n of Dr. Hartinan's name is evidently an 

 error (quite pardonable in a German), which I have not thought it 

 amiss to correct. 



P. BICOLOR (Hartman). Frontispiece, figs. 1, 2, 3, 4. 



Shell broadly and deeply rim ate, ovate, thin but moderately strong ; 

 the type denuded, the last whorl whitish, the spire orange-red, but 

 showing traces of a thin, pale-yellow cuticle with narrow dark brown 

 streaks or lines. Surface rather irregularly wrinkle-striate, with 

 faint, fine spiral striation in places. Spire short, conic, the apex 

 acute. Whorls slightly exceeding 4, rapidly widening, moderately 

 convex, the last quite convex below the suture and at the sack-like 

 base, the suture less oblique anteriorly. Aperture vertical or even 

 with the base a little produced forward, ovate, bluish-white within ; 

 peristome buff, expanded and very narrowly recurved, a little thick- 

 ened ; the columellar margin reflexed, a little sinuous. A small, 

 deep-seated fold may be seen by looking obliquely into the aperture. 

 Parietal wall bearing a transparent, whitish callus, faintly thickened 

 in the middle. 



Length 34^, diam. 20, longest axis of aperture with peristome 21-^ 

 mill. 



Alt. 41, diam. 21, alt. aperture 27 mill. (Kobelt). 



Aura Island, New Hebrides (Layard). 



Charts bicolor HARTM., Proc. Acad. N. S. Phila., 1889, p. 91, pi. 

 5, f. 1, la. Placostylus (Charts) bicolor KOBELT, Conchyl. Cab., p. 

 81, pi. 19, f. 5, 6. J. MABILLE, Soc. d' Hist. Nat, d'Autun, 1895, 

 p. 410. 



The figured type is here described and illustrated (figs. 1-3). 

 Like all the specimens known, it is weathered and almost totally 

 denuded of cuticle, with the surface somewhat corroded. Kobelt 

 figures and describes a larger specimen, more slender, with 4^ whorls 

 and a much more distinct parietal nodule (fig. 4). The lineolate 

 cuticle and orange spire allies this to P. hartmani, which differs in 

 being more slender with broadly flaring lip and a far longer aperture. 

 It is only superficially similar to the Vitian P. ochrostoma. Hart- 

 man's label reads " Santo Island, near Aura Island." 



P. FRANCOISI J. Mabille, Unfigured. 



Shell broadly or rather narrowly perforate, ovate-oblong, but 



