90 PLACOSTYLUS, SOLOMON IS. 



P. (?) coxi (Pease). 



Shell thick, ovate, perforate, dextral, longitudinally roughened 

 with growth strise, whitish suffused with roseate, the spire yellowish. 

 Whorls 4, somewhat swollen, the last three-fifths the total length of 

 the shell. Spire short, somewhat obtuse, the suture well impressed. 

 Aperture vertical, oval, reddish inside ; peristome pale orange, thick, 

 the margins joined by a callus, the columellar margin nearly closing 

 the perforation. Length 25, diam. 15 mill. (Pse.). 



Solomon Islands (Cox). 



Bulimus (? Borus) coxi PEASE, Amer. Journ. of Conch, vii, p. 

 197 (1871). 



"The above, in shape and general proportions, as well as in color, 

 is a miniature B. rosaceus (King). The last whorl is whitish, suf- 

 fused with rose color, spire yellowish, aperture reddish, and margin 

 of the peristome light orange color. Its surface is not granulose, but 

 roughened by incremental striae. I attach to this species the name 

 of Dr. J. C. Cox, through whose active researches, during the past 

 few years, we are indebted for an extended knowledge of the mollus- 

 cous fauna of the Australian and Papuan provinces." (Pease.) 



Known by the above description only. The type is not in the 

 Pease collection at Cambridge (Mus. Comp. Zool.), and it has not 

 been figured. Seems to resemble P. ochrostoma Garrett, somewhat. 



Group of P. scotti. 

 Shell distinctly wrinkled spirally. 



P. SCOTTII (Cox). PL 37, figs. 38, 39. 



Shell perforate, oblong-fusiform, moderately solid, of a slightly 

 greenish-yellow, with narrow olivaceous or olive-brown streaks, 

 suture narrowly white-margined, the spire white above. Surface 

 glossy, having growth-wrinkles, and covered with a rather coarse 

 obliquely spiral corrugation of anastomosing wrinkles (fig. 39); the 

 earlier 2^ whorls punctate as usual. Spire conic, rather slender, the 

 apex obtuse, whorls slightly exceeding 5, somewhat convex, the last 

 long-oval. 



Aperture white throughout, ovate ; peristome white, the outer lip 

 blunt, becoming expanded below, moderately thickened within. Col- 

 umella suddenly dilated above, forked, the inner edge forming a 

 strongly convex fold, the edge of which is somewhat curved outward; 



