48 HELIX. 



H. HOOKERI, Reeve. PI. 5, fig. 83. 



Narrowly perforate, somewhat solid, striate, with a brownish 

 olivaceous epidermis ; whorls 4-4^, convex, moderately increas- 

 ing, the last not descending, depressed, rounded. Diam. 7 mill. 



Kergaelen Island. 

 H. DISSIMILIS, d'Orb. PI. 5, fig. 90. 



Widely umbilicated, depressed, thin, close!}' plicatulate above, 

 lio;ht corneous straw-color, maculated and flamed above with 



o ' 



chestnut, the space with spiral series of chestnut dots ; whorls 



5J, convex, suture deep. Diam. 11 mill. 



Near Concepcion, Chili. 



H. histrio, Miihlf., and H. plagiata, Beck, are synonyms. 



H. BlNNEYANA, Pfl\ PI. 5, fig. 91. 



Widely umbilicated, discoidal, yellowish corneous, with undu- 

 lating chestnut strigations, base obsoletely marbled, irregularly 

 plicate, with very close, impressed, spiral lines above, more 

 obsolete below; whorls 5, the last narrow, scarcely descending. 



Diarn. 15 mill. 



Ins Chiloe. 



H. TENUISTRIA, H. ZEBRTNA, Phil. (Unfigured.) Chili. 



H. GRATIOLETI, Hupe. (Unfigured.) Chili. 



Subsection MACROCYCLOIDES, Martens, 1867. 



H. OBSCURATA, Ads. and Reeve. PL 5, figs. 92-94. 



Widely umbilicated, somewhat thin, costulate-striate, decus- 

 sated by close spiral lines, shining, diaphanous, olivaceous cor- 

 neous ; suture deep ; whorls 5, a little convex, the last large; 



margins of aperture approaching. Diam. 12 mill. 



Borneo. 



H. Arthur ii, Pfr., and H. tradita, Reeve, are synonyms. 



H. LUTEA, Martens. PL 5, figs. 95-97. 



Perspective!}- umbilicated, striulate, shining, yellowish, suture 

 rather deep ; whorls 3^-4, somewhat flattened above, periphery 

 and base rounded; margins of aperture distant. Diam, 11 mill. 



Ins. Burn, Moluccas. 



