12 HELIX-PAPUINA. 



H. WALLERI Brazier. PI. 6, figs. 11, 12. 



Shell imperforate, depressedly trochiform, rather thin, obliquely, 

 irregularly and obscurely striated ; yellowish-white, with two dark 

 chocolate bands, thickly crossed with white diaphanous zigzag mark- 

 ings encircling the last whorl, the uppermost band the broadest ; 

 spire obtusely conical, apex white ; whorls 5, flatly convex, sutures 

 impressed, last whorl descending in front, base a little tumid ante- 

 riorly ; aperture oblique, subrhomboidal ; peristome very slightly 

 thickened and expanded, and but little reflexed, the right margin 

 moderately sinuated ; columellar margin somewhat flattened and 

 dilated with a straight abrupt callus ; the umbilical region and the 

 inner edge of the lip with the reflected portion brown, immediately 

 behind which is a band of pigment-like deposit of a brilliant orange 

 color. (Angas.) 



Alt. 13, greater diam. 22, lesser 18 mill. 



Ysabel Island, Solomon Group. 



H. brenchleyi ANGAS, P. Z. S. 1878, p. 861, t. 54, f. 7 (not H. 

 brenclileyi Braz.). H. (Papuina) walleri BRAZIER, Proc. Linn. Soc. 

 N. S. Wales viii, p. 228, 1883. 



Has the orange coloring of H. boivini behind the lip, but is more 

 depressed, and otherwise different. 



H. ALFREDI COX. PI. 6, figS. 7, 8. 



Imperforate, depressed-globose, glabrous, shining, polished, black- 

 ish-brown, having two opaque-white bands, one at periphrey, the 

 other below the suture. Spire w r ide-conic, whorls 5, slowly widen- 

 ing, nearly flat, the last shortly deflexed in front. Aperture semi- 

 oval ; peristome white, simple, shortly reflexed ; columella dilated, 

 appressed. 



Alt. 0.85, greater diam. 0.93, lesser 0.82 inch. (Cox.) 



Solomon Is. 



H. alfredi Cox, P. Z. S. 1871, p. 323, t. 34, f. 1, la. PFR., 

 Monogr., vii, p. 311. H. alfredi var. trichroa MARTENS, Conchol. 

 Mittheil. i, p. 5, t. 2, f. 8-10 ; 1880. 



A polished blackish-brown shell, with strongly contrasting bands 

 of opaque-white at suture and circumference. 



Var. TKICIIROA Martens. PI. 6, figs. 4, 5, 6. 



Imperforate, rotund-conoidal, subtly striatulate, shining, tawny, 

 the periphery whitish, bordered above and below with black ; sutural 



