GASTEROPODA. 3] 
NantNa Luripa (Gould). 
Testa globoso-conica, depressa, glaberrima, nitida, livido-castanea, mfra 
pallescens, ad umbilicum minutum declivis : spira anfractibus sex con- 
veris, radiatim et obtusé striatis, ultimo prope aperturam subangulato ; 
sutura impressa, marginata: apertura lunata, fauce lvida ; labro 
acuto, ad umbilicum reflexo, albo. 
Helix lurida, Goutv; Proceed. Boston Soc. Nat. Hist., 1. 179. 
Nov. 1846. Expedition Shells, 25. Pretrrer ; Monog. Helic., 1. 47. 
Suet globose-conical, depressed, moderately thick, polished and 
shining, with only rather distant, obtuse, radiating striz above. Colour 
lurid, or chestnut diluted with olive ; beneath becoming centrally paler, 
until at the umbilicus it is nearly straw-coloured. Whorls six, convex, 
the last whorl somewhat angulated towards the aperture. Suture 
well impressed, with a marginal impressed line. Aperture semilunar, 
the throat livid; lip simple and sharp, slightly reflected at the umbili- 
cus, which is very minute; central region excavated beneath. 
Diameter one inch; axis half an inch. 
Inhabits the Feejee Islands. 
Very similar to H. rubricata, which, however, is rather larger, more 
solid and globose, darker coloured. It differs essentially in the want 
~ of revolving striz, its carinated periphery, and the light colour above 
the umbilicus. It groups with H. veludina, Sowb., and doubtless 
belongs to NaNnIna. 
Figures 68, 63 a, 68 b, three views of the shell. 
Nantna casca (Gould), 
Testa tenuis, depresso-globosa, nitida, pallidé stramineo-virescens, arcte 
umbilicata : spira anfractibus quinque haud turgtdis, strits increments 
obsoletis : sutura haud impressa, marginata: apertura semilunaris ; 
labro simplici, acuto, ad umlilicum paulum reflexo. 
