97 



DESCRIPTIONS OF NEW MOLLUSCA, CHIEFLY FROM 



NEW CALEDONIA. 



By C. Hedley, F.L.S. 



Placostylus remotus, n.sp. 



(Figs. 1-2.) 



Shell an elongate cone, narrow in proportion to length, thick 

 and strong, anteriorly broad and blunt, posteriorly tapering 

 slowly, scarcely perforate. Colour pale ochre, with a darker broad 

 peripheral band, which is edged above and below with a pale 

 border, and a narrow, dull white margin below the suture. 

 Whorls six, rounded, apex blunt, nepionic shell a whorl and a 

 half. Suture impressed. Sculpture; — every- 

 where irregularly crossed by oblique growth 

 lines, both fine and coarse, which interrupt 

 and distort a series of minute, numerous, 

 irregular, spiral scratches which are not to be 

 perceived without a lens (fig. 2). Aperture 

 oblique, rudely hexagonal, subchannelled 

 anteriorly. Columella thickened, externally folded over a 

 narrow umbilical chink, internally sharply bent, the upper limb 

 a flat, deeply entering and obliquely ascending plate, the lower 

 swelling into a slight but distinct tubercle. Outer lip internally 

 much thickened, but neither thickened nor reflected externally, 

 forming a sharp angle at the insertion. A thin callus is spread 

 on the body whorl. In the specimen described the anterior 

 corner of the aperture is externally surrounded by a series of 

 imbricating lamellae; this may, however, be an individual feature 

 or repair of breakage. Length 26, breadth 12 mm. 



H a b. — The Mambare Goldfleld, Brit. N. Guinea. 



T y p e. — In the collection of Dr. J. C. Cox. 



