PLACOSTYLUS, NEW CALEDONIA. 



P. CURTUS, (Crosse). PI. 7, fig. 17 ; pi. 8, figs. 23, 24. 



Shell imperforate, oval or oval-conic, comparatively not thick but 

 solid, irregularly and coarsely striate longitudinally, and transversely 

 malleate, especially on the last whorl. Rose-yellowish under a per- 

 sistent epidermis of a more or less intense brown color. Spire con- 

 vexly conic, the summit rosy yellow, denuded, smooth and glossy. 

 Suture impressed. Whorls 6^, a little convex, the last moderately 

 swollen and exceeding three-fifths the total length of the shell, a little 

 ascending in front. 



Aperture sub vertical, a little receding toward the base, acutely 

 oval, glossy and orange-purple inside ; peristome of the same color, 

 but becoming yellowish outwardly ; margins united by a thin callus 

 colored like the peristome ; columellar margin a little dilated near its 

 insertion, with an almost imperceptible fold. ( Crosse for P. layardi). 



Length 76, diam. 39, aperture 43 mill. (Crosse). 



Length 76, diam. 44, aperture 43 mill. (KobelC). 



Mont Tiebayhi, near Coumac, in northwestern Neio Caledonia 

 ( Rossi ter). 



Phtcostylus layardi KOBELT, Conchyl. Cab. p. 110, pi. 27, f. 1, 2. 

 -CROSSE, J. de C., 1894, p. 292, pi. 9,f. 1, with var. cnrta, p. 293, 

 pi. 9, f. 2. 



Though thinner than most New Caledonian species of Placostylus, 

 this species is thicker, more solid and broader than P. eddystonensis. 

 It differs from P. bavayi in the fine color of the aperture and less 

 inflated last whorl. 



Typical curtus Crosse (pi. 7, fig. 17) is smaller than the specimens 

 originally described as layardi, (pi. 8, f. 23, 24), somewhat inflated, 

 scarcely submalleate, fleshy-whitish under a pale chestnut cuticle; 

 aperture ovate, orange-purple, paler inside. Alt. 69, diam. 37, apert. 

 40 mill. It is from Coumac. 



The name layardi is preoccupied in the subgenus Diplomorpha, 

 and Crosse's varietal name must be substituted. 



P. SAVESI Crosse. PI. 6, figs. 4, 5. 



Shell nearly covered-rimate or imperforate, oblong, moderately 

 thick, rather solid, malleate-wrinkled ; pale fleshy-whitish under a 

 thin, deciduous, chestnut epidermis. Spire rather long, the apex 

 slightly obtuse, nearly smooth, glossy, whitish ; suture irregularly im- 

 pressed. Whorls 6^, a trifle convex, the earlier 4 destitute of epi- 



