HELIX-HADRA. 177 



granulation will separate the form from the somewhat similar species 

 of Sulcobasis (H. rehsei etc.). It should be noted that in the forma- 

 tion of the aperture and lip, H. broadbenti is very similar to H. 

 rehsei. 

 H. HIXONI Brazier. PL 25, fig. 91. 



Shell with a covered umbilicus, globosely depressed, rather solid, 

 obliquely striated, more rugose on the lower whorl, white under a 

 thin yellowish epidermis, mottled with irregular light brown opaque 

 spots and spiral lines and bands ; whorls 4, convex, the last descend- 

 ing a little in front, roundly convex, having a narrow line contig- 

 uous to the suture, another just above, a broader one above it near 

 the suture and breaking off on the second whorl into irregular spots ; 

 spire obtuse, apex tipped with brown ; base convex, covered with a 

 thin shining yellowish epidermis, encircled near the center with a 

 narrow brown line running spirally into the interior ; aperture ob- 

 lique, ovately rounded, interior blue black ; peristome white, thick, 

 reflected, margins approximating, joined by a thin white callus show- 

 ing a chestnut brown hue beneath, the right. slightly flexuous ; col- 

 umellar margin broadly expanded and reflected, covering the um- 

 bilicus. (Brazier?) 



Alt. 25, greater diarn. 40, lesser 31$ mill. 



Hall Sound, New Guinea. 



H. Hixoni BRAZIER Proc. Linn. Soc. N. S. Wales, ii, p. 120. 

 TAPPARONE-CANEFRI, Ann. Mus. Civ. Genova, xix, p. 187, t. 5, 

 f. 22. 



Differs from the preceding in coloration and the covered umbili- 

 cus. The locality is not certain, as the original specimen was ob- 

 tained from a trader. 



H. PURPUROSTOMA Le Guillou. Unfigured. 



Shell orbicular, umbilicate, plane above, white, pellucid ; whorls 

 4$, somewhat convex, separated by a deep suture, the last orna- 

 mented with a spirally descending rather wide purple-black band, 

 convex beneath, white ; umbilicus deep, moderate, effuse and angled 

 at its opening ; aperture most oblique, rotund ; peristome narrowly 

 reflexed, within and outside rosy, strangulated. Alt. 9, diam. 20 



mill. (Giiill.') 



Triton Bay, New Guinea. 



H. purpurostoma GUILL., Kev. Zool. 1842, p. 141. Pfr. Monogr. 

 i, p. 377. TAPPARONE-CANEFRI, Ann. Mus. Civ. Genova, xix, p. 



159. 



12 



