HELIX-PAPUINA. 19 



H. PLAGIOSTOMA Pfeiffer. PL 10, figs. 88, 89. 



Narrowly perforated, elevated trochiform, carinated at the periph- 

 ery ; slightly striated obliquely ; covered with a thin yellowish-olive 

 epidermis, beneath which the substance of the shell is purplish-pink ; 

 the lip expanded and of the same color. 



The spire is conical ; whorls 5, the last not descending in front. 

 The upper whorls are pale purple-pink, as is the whole shell when 

 denuded of the thin epidermis. There is a yellowish-white border 

 below the suture. The base sometimes shows very fine concentric 

 striae under a lens and is rather flattened. Aperture subtriangular ; 

 outer lip expanded, thin, flesh colored or purplish ; columella 

 triangularly reflexed, its inner face nearly straight and vertical. 



Alt. 26-26* diam. 21-22 mill. 



Solomon Islands. 



H. plagiostoma PFR., P. Z. S. 1856, p. 381 ; Mai. Bl. 1856, p. 238 ; 

 Monogr. iv, p. 255. 



Allied to H. adonis, but of a totally different tone of coloration, 

 wider body-whorl, and the upper part of the outer lip is more ex- 

 panded. The locality " Admiralty Is " given by Pfeifter is an 

 error. 



H. GUPPYI Smith. PL 10, fig. 95, (enlarged). 



Shell elevately conical, thin, pale yellow, ornamented with con- 

 spicuous nearly black or black-brown spiral bands, one above and 

 one below the sutures of the upper whorls, and three upon the last, 

 one sutural, the second peripheral, and the third basal ; volutions 6, 

 rather slowly enlarging, a little convex, sculptured with fine oblique 

 strife of growth, not glossy. Three first whorls livid purplish, the 

 last rather sharply angled at the middle, not descending in front, 

 having the basal band broad around the almost concealed perfora- 

 tion, and obsolete within the aperture. The latter is oblique, some- 

 what narrowed and pouting in front, banded within with three 

 almost black and two white bands, the central one of the former be- 

 ing squarely truncate at the end, only the lower corner of it touch- 

 ing the margin of the lip, which is pale, oblique, receding, a little 

 expanded and reflexed in front at the columellar margin, the upper 

 end of which is spread and nearly conceals the small umbilicus. 

 Height 22i mill., greatest diam. 19, smallest 16. (Smith.') 

 Faro Island, Bougainville Strait* ; in the higher parts of the 

 island up to the summit, 1900 feet above the sea. 



