HELIX. 61 



H. RURUTUENSIS, Garrett. (Unfigured). Rurrutu, Austral Is. 



b. Carinate. 

 H. OBOLUS, Gould. PI. 11, figs. 77-79. 



Rather thin, widely nmbilicated, radiately, thinly, irregularly, 

 rugosely striate, irregularly concentrically sulcate or thinly cos- 

 tate ; whorls 7, convex, often angulated, the last with angulated 

 periphery ; aperture with a single parietal lamella. Diam. 6 mill. 



Ins. Raiatea, Taheiti. 



H. acetabulum, Pease; H. celsa, Pease ; H. Bariffi, Garrett, 

 and H inter mixta, Mousson, are synonyms. 



H. STELLULA, Gould. PL 11, figs. 84-86. 



Widely umbilicated, planulate above, convex below, yellowish, 

 maculated with chestnut; whorls 4, trigonal, with numerous 

 elevated acute costre, the periphery carinate ; aperture with 



a parietal lamella. Diam. 5 mill. 



Sandwich Is. 

 H. BINARTA, Pfr. PL 11, figs. 87, 88. 



Moderatel} 7 umbilicated, obtusely arcuately costate, spirally 

 obsoletely striate, corneous, strigate with chestnut, suture 

 margined; whorls 5J, somewhat convex, slowly increasing, the 

 last not descending, subacutely carinated ; parietal wall with 

 two white lamelhie, columella obsoletely dentate. Diam. 4%5 mill. 



Sandwich Islands. 



H. VELATA, Hombr. et Jacq. PL 11, figs. 89-91. 



Narrowly umbilicated, striate, grayish corneous; whorls 5^, 

 planulate, the last with acutely carinated periphery, base convex, 

 smoother; aperture with a compressed, subquadrate parietal 

 lamina, basal margin subthickened. Diam. 8 mill. 



Ins. Hogoleu. 

 H. HUAHEINENSIS, Pfr. PL 11, figs. 92-94. 



Widely umbilicated, rather thin, striate, opaque, light cor- 

 neous, strigate and maculate with chestnut, apex very minutely 

 mucronate, suture linear; whorls 6, somewhat flattened, very 

 slowly increasing, the last carinated, not descending in front, 

 base subcompressed around the umbilicus ; aperture with a 



single parietal lamella. Diam. 6 mill. 



Huaheine, Society Islands. 

 H. aranea, Behn, is a synonym. 



