34 PLACOSTYLUS, NEW CALEDONIA. 



dermis, the last whorl longer than the spire, somewhat inflated in the 

 middle, tapering at base. 



Aperture ovate-angulate, red within, paler in the throat ; peri- 

 stome somewhat thickened, vivid red, margined with whitish, the 

 margins connected by a livid whitish parietal callus. Columellar 

 margin dilated, expanded, subreflexed, nearly straight; basal mar- 

 gin narrowly rounded ; outer margin a little thickened, the thickening 

 not extending to the posterior insertion. Length 56, diam. 28, apert. 

 30 mill. (Crosse.) 



Ponembon (Marie) ; fossil at Artillery Point, Noumea (Saves). 



Placostylus savesi CROSSE, J. de C., 1886, p. 163, pi. 7, f. 3, 3a ; 

 1894, p. 294. 



Differs from P. eddystonensis by the shorter, more compact form 

 and the coloration ; from P. bavayi by the less dilated last whorl and 

 narrower aperture, with no trace of a parietal tubercle. It may per- 

 haps be allied more closely to P. ouveanus and other small members 

 of i\\efibratus group. 



P. ROSSITKRI (Brazier). PL 24, figs. 12, 13. 



Shell imperforate, oblong, moderately solid ; chestnut with many 

 darker streaks, the suture white-bordered. Surface smoothish, with 

 irregular growth-wrinkles, the penultimate whorl generally malleated 

 transversely. Spire convexly conic. Whorls 6, several earlier ones 

 denuded, fleshy-yellow tinted, the last whorl oval, not inflated, taper- 

 ing below. 



Aperture sub vertical, ovate, brilliant scarlet or yellow within ; 

 peristome distinctly thickened with a deep scarlet callus within, the 

 edge obtuse, flesh-colored and dull outwardly ; columella deep scarlet, 

 with a moderate fold above ; parietal callus moderately thick, of the 

 same color, toothless. 



Alt. 58, diam. 28, aperture with peristome 31 mill. 



Alt. 52, diam. 26, aperture with peristome 29 mill. 



Nehone Bay, northwestern coast of New Caledonia ( Rossi ter). 



Bidimus rossiteri BRAZIER, Proc. Linn. Soc. N. S. W., vi, June, 



1881, p. 586 Bulimus (Placosfylus] rossiteri Brazier, CROSSE, J. 



de C., 1881, p. 338, pi. 12, f. 6 Placostylus rossiteri Braz., Ko- 

 BELT, t. c., p. 39, pi. 9, f. 4, 5. CROSSE, J. de C., 1894, p. 294. 



Distinguished by its oblong, not inflated form, dark-streaked cuti- 

 cle, and the intense red of the aperture. The last whorl is not at 

 all, or but little, malleated. Type in coll. A. N. S. Phila. 



