76 HELIX-PAPUINA. 



Aperture oblique ; lip white, very broadly and flatly expanded, 

 thickened within, abruptly narrowing toward the columellar termina- 

 tion. Alt. 11, greater diam. 15 mill. 



Wild Island, Admiralty Group. 



H. labillardierei E. A. SMITH, P. Z. S. 1884, p. 264, t. 22, f. 3, 3a. 



Allied to H. helicinoides, but readily distinguished by the broad 

 lip, constantly black apex, and more globose body-whorl, upon 

 which the keel is more or less obsolete on the latter portion. The 

 convexity of the base around the umbilicus, reminds one of H. 

 helicinoides. 



H. HELICINOIDES Hombron & Jacquinot. PI. 15, figs. 72, 73, 74. 



Imperforate, trochiform, the spire conical, periphery acutely 

 carinated. Surface lightly striatulate, and densely, most minutely 

 spirally striated. Pale horn-colored, somewhat translucent ; aperture 

 subrhomboidal ; peristome thickened within, slightly expanded, its 

 face flattened; slightly angled at the position of the carina; 

 columellar margin narrow, having an obtuse callous fold above, 

 near the insertion. 



There are 5 whorls, those of the spire nearly rectilinear, the last 

 whorl slightly convex above and below. The base is deeply impressed 

 at the axis, having a little pit at the place of the umbilicus ; around 

 the depression it is very convex, rendering the baso-columellar lip 

 strongly arcuate. Alt. 12, greater diam. 15, lesser 14 mill. 



Solomon Islands. 



H. helicinoides H. & J. (PFR., Zeitschr. f. Mai. 1849, p. 77) Voy. 

 Pol Sud Atlas, t. 7, f. 34-37. PFR., Conchy 1. Cab., p. 294, t. 125, 

 f. 14, 15 ; Monogr. iii, p. 104. H. cleryi RECLUZ, Journ. de Conchyl. 

 1851, p. 211, t. 5,f. 10. PFR., Monogr. iii, p. 179. E. A. SMITH, 

 P. Z. S. 1885, p. 592, t. 36, f. 6, (with varieties.) 



The prominent characters of typical helicinoides are the distinctly 

 narrowed, sinuous columella, strongly arcuate baso-columellar lip, 

 and flattened peristome. The typical helicinoides is of a uniform 

 light color. Specimens with these characters strongly developed 

 form Mr. Smith's var. simboana. 



Var. CLERYI Recluz. PL 15, figs. 81, 82, 83, 86-87. 



Rather thinner than typical helicinoides, the lip generally nar- 

 rower, less expanded, columella less calloused, basal lip less arcuate ; 



