HELIX-PAPUINA. 79 



sometimes showing excessively fine spiral lines in places on the base. 

 Opaque, white or bluish, creamy or pinkish tinted, unicolored or 

 having a brown band above, often showing a few scattered translu- 

 cent dots. Whorls 5J, slightly convex. 



Aperture oblique, subrhombic, the peristome white or brown, 

 somewhat thickened and obtuse but not expanded, the superior 

 margin straight, basal margin forming a regular curve from outer 

 angle to insertion, a little thickened within and straightened at the 

 columellar slope. 



Alt. 9J, greater diam. 15, lesser 13 mill. 



Alt. 9J, greater diam. 12*, lesser 11 mill. 



New Hebrides (Island of Vate.) 



H. em PFR., P. Z. S. 1852, p. 84 ; Monogr. iii, p. 180 ; Conchyl. 

 Cab., p. 190, t. 160, f. 22, 23. REEVE, Conch. Icon., f. 977. 

 BRAZIER, Journ. de Conchyl. 1880, p. 313. 



This species has the contour of H. helicinoides except that the lip 

 is not expanded, the columella not contorted, the base flatter, and 

 consequently the basal lip is much less strongly arcuate. It further 

 differs in being more solid and opaque. These same characters 

 separate it from cleryi. It is far flatter below and more solid and 

 opaque than H. cineracea. 



A form with obtuse periphery also occurs. See pi. 16, figs. 1. 



H. LAYARDI Hartman. PI. 15, figs. 94, 95, 96, 97. 



Imperforate, solid, opaque, trochiform, the spire straightly conical, 

 periphery acutely carinated, base flattened. The surface is shining, 

 lightly striatulate. Color white, more or less suffused or streaked 

 with pink in places, having very numerous purplish translucent dots 

 and zigzag marks above, fewer below ; often banded. 



There are 6^ flat whorls, the carina of the last acute, having a 

 delicate line of white at the edge, bordered above and below with 

 dark purplish-brown. When bands are present there is a faint one 

 in the middle of the upper surface, and a broad or narrow one on 

 the base. They are visible within the aperture. The aperture is 

 rhomboidal, very oblique, the lip not expanded, blunt, white; 

 columella oblique, straight, often brown. 



Alt. 14?, greater diam. 17, lesser 14* mill. 



Alt. 14J, greater diam. 15, lesser 13 mill. 



Aura Island, New Hebrides. 



