PLACOSTYLUS, KI.JI IS. 103 



part of last, whorl very prettily marked with xigzag whitish streaks. 

 Spire turrited-conic, with small, scarcely blunted apex. Whorls 6, 

 separated by a deep and lightly crenate suture, the early whorls but 

 little convex, the later flattened above, more convex below ; the last 

 whorl about three-fifths the total length, slightly compressed below, 

 descending to the aperture. 



Aperture slightly oblique, slightly longer than the spire, acumin- 

 ate above, bluish within ; peristome unexpanded, thickened, obtuse, 

 butl-whitish, the terminations joined by a thin parietal callus with 

 thickened outer edge. Columella arcuate, with a regularly curved, 

 not much projecting fold above, superposed upon which there is a 

 very strong, projecting white callus, visible by rolling the shell and 

 looking obliquely into the aperture. (Kobelt.) 



Alt. 72, diam. 35, alt. aperture 38 mill. (Kobelt, figs. 11-13). 



Alt. Go, diam. 29, alt. aperture 34 mill. (Specimen, figs. 14, 1.3). 



Viti Is. (Paetel coll.). 



Placostylus paeteli KOBELT, Conchy]. Cab., p. 65, pi. 16, f. 1, 2 

 (1891) BuL moussoni Graeffe, in Berlin Mus. 



Not closely allied to any other Vitian species. The unusually 

 heavy callous fold upon the columella is not visible from the front, 

 but may be seen only by looking obliquely into the aperture. The 

 single specimen before me is somewhat smaller than the type in the 

 Berlin Museum, though evidently older, the inner lip being very 

 heavily calloused and straighter than in Kobelt's figure. Figure 

 14 represents an obliquely basal view of this shell. 



P. fiAKKKTTi Pilsbry, n. sp. PI. 44, figs. 16, 17, 18. 



Shell perforate, oblong-fusiform, moderately solid, flesh-tinted 

 under a persistent and rather strong chestnut or olive-brown cuticle, 

 somewhat streaked, and usually with a series of darker brown 

 blotches below the suture, from which paler or denuded zigzag 

 stripes descend upon the penultimate whorl. Surface somewhat 

 shining, moderately striate and wrinkled, rather coarsely corrugated 

 spirally, the corrugation becoming obsolete near the termination of 

 the last whorl ; 2^ early whorls punctate. Whorls slightly over 5, 

 moderately convex, the last oblong. 



Aperture long-ovate, somewhat oblique, brown inside ; peristome 

 narrowly reflexed, pure white or brown-tinted ; columella dilated 

 above, with a long gentle fold ; parietal callus thin and translucent, 

 becoming heavy in old shells. 



