PLACOSTYLUS, SOLOMON IS. 89 



times fine riblets on the middle and base of last whorl, with a very 

 fine malleation across them, produced by close, shallow, spiral de- 

 pressions ; these impressions sometimes obvious, sometimes reduced 

 to mere shallow depressions between growth-striae. It is of the 

 nature of the sculpture of P. elobatns, etc., but on a very small and 

 superficial scale, and is not like that of P. macyillivrayi or palmarum. 



With the well-reflexed and slightly recurved lip of P. strangei, 

 this species has another sculpture and a stouter spire. Fig. 3G is 

 No. 159494 U. S. Nat. Mus.; fig. 37 is 4GG7 of the Academy collec- 

 tion. 



The localities " Erumanga, New Hebrides," and "New Cale- 

 donia," formerly given by Pf'eiffer, are incorrect. It is evidently a 

 Solomon Island species, the locality " New Georgia " being on 

 Brazier's authority. 



In my opinion the shells described by Kobelt as P. (scottii, var.) 

 mendance belong to stidchburyi. It should be noted that Kobelt had 

 specimens of neither scottii nor stutclibiiryi for comparison, and 

 might thus readily think his form a new one. The original descrip- 

 tion follows: 



Var. MENDAN.E Kobelt. PL 37, figs. 40, 41. 



Shell riniate, ovate-conic, rather solid, roughly striate-costate, and 

 made granose or decussated by transverse wavy stria?; yellowish- 

 brown with darker streaks, the apex paler. Spire conic, apex 

 obtuse, beautifully granulate. Whorls 6, convex, separated by an 

 impressed, crenulated, slightly whitish-margined suture, the last 

 whorl large, rather inflated, double the length of the spire, descend- 

 ing, a trifle ascending in front. Aperture large, ovate-acuminate, 

 diluted at base, the throat whitish-brown ; peristome white, slightly 

 thickened, moderately expanded, the margins joined by a very thin 

 callus, outer lip very slightly sinuous above, then produced ; colu- 

 mellar margin dilated, bearing a strong, compressed, white entering 

 fold. Alt. 52, diam. 26, alt. of aperture 32 mill. (Kobelt). 



Solomon Is. 



Placostylus (scottii Cox var.) mendance KOBELT, Conchyl. Cab., 

 Placostylus, p. 133, pi. 32, f. 6, 7 (1891). 



Described from two specimens, one in coll. Dohrn, the other in 

 the Berlin Museum. Named for Mendana, the discoverer of the 

 Solomon Islands. 



