6 HELIX-PAPUINA. 



Like H. chancei in coloring, but so different in proportions that I 

 do not feel justified in uniting them. 



Differs from H. pileus, If. lento, and H. euchroe's in being im- 

 perforate at all stages of growth, a young specimen before me having 

 the slender axis completely solid. The specimens before me are 

 three in number. They were presented to the Academy by John 

 H. Campbell Esq., of Philadelphia. Figures 52, 53 represent a 

 perfect specimen. The original of fig. 54 is somewhat worn, making 

 the upper band appear more broken and narrower than it naturally 

 is. I give the locality with much doubt, as I do not know the 

 history of the specimens. 



H. BOIVINI Petit. PL 6, figs. 13, 14, 15, 16, 19, 20. 



Imperforate, turbinate, smooth, the periphery rounded ; white, 

 banded with blackish-brown ; lip edged with bright orange-red. 



The spire is conical, apex obtuse ; whorls 6, slightly convex, the 

 last rounded at the periphery, slightly descending in front. Surface 

 striatulate, smooth, shining. Color white or cream, conspicuously 

 banded with blackish-brown bands, of which one above and one 

 below the periphery are most constant (there being also, .usually, a 

 band a short distance below the suture and one or several on the 

 base). Aperture very oblique, banded within ; peristome narrowly 

 expanded, white, edged with intense orange. Columella sloping, 

 straightened, flattened, dilated and closely appressed over the 

 umbilical tract. 



Alt, 27, greater diam. 25, lesser 22 mill. 



Alt. 20, greater diam. 21 mill. 



Bougainville and. Ysabel, Solomon Group. 



H. boivini PET., Rev. Zool. 1841, p. 184. DESH., in Fer. Hist. t. 

 108C, f. 7, 8. REEVE, f. 410. PFR., Monogr. i, p. 230 ; Conchyl. 

 Cab. p, 433, t. 151, f. 56. v. MARTENS, Monatsber. k.-preuss. Akad. 

 Wissensch. zu Berlin, 1877, p. 276, t. 2, f. 11-13 (anatomy). 

 BRAZIER, Journ. de Conchyl. 1880, p. 306. H. subrepta HOMBR. & 

 JACQ., Voy. au Pol Sud, Atlas, t. 4, f. 1-6. H. colorata MOUSSON, 

 teste PFR., Monogr. iii, p. 174. 



Readily recognized by the brilliant orange edge of the narrowly 

 reflexed lip, and the black bands. There are often some reddish- 

 brown bands also ; and some specimens have the greater part of the 

 base of this color. 



