266 LYROPUPA. 



/one. The shape varies from cylindric to more tapering. 

 Spiral striation is riot perceptible in most specimens, but it is 

 faintly visible on some. 



18. Lyropupa ovatula kona P. & C., n. sp. PI. 26, figs. 10, 

 11, 14, 5. 



The shell is shortly cylindric, the upper third conic, apex 

 obtuse ; whorls convex, the last contracted below the periphery. 

 Cinnamon-colored. The first iy 2 whorls are smooth (micro- 

 scopically pitted), the rest with coarse sculpture of well-spaced 

 ribs, quite oblique, retractive on the spire, nearly vertical on 

 the last whorl, where they are usually interrupted or partly 

 so in the middle, and about 16 in number. The intercostal 

 intervals are nearly smooth, without spiral striae. The last 

 whorl has a conspicuous constriction in the middle, stronger 

 on its last half; there is an inconspicuous furrow (sometimes 

 obsolete) over the position of the lower palatal fold, and a 

 short basal furrow. Behind the basal and lower palatal fur- 

 rows, and below the main constriction, there is a small in- 

 flation or hump. The aperture is wide, with continuous, ex- 

 panded peristome. Angular lamella long; parietal lamella 

 high, not emerging. The columellar lamella is very- deeply 

 placed. The upper palatal fold defines a nearly closed sinulus. 

 Lower palatal is very deeply placed, a rather strong, oblong 

 tubercle. Basal fold, below the preceding, similar but nar- 

 rower (or sometimes shorter). Below the inner end of the 

 upper palatal there is a barrier formed of two erect tubercles, 

 representing the inner ends of the lower palatal and basal 

 folds (pi. 26, fig. 10). 



Length 2.3, diarn. 1.25 mm.; 5y 2 whorls (type, Huehue). 



Length 2.1, diam. 1.25 mm. (Huehue). 



Length 2.25, diam. 1.3 mm. (Kapulehu). 



Hawaii: North Kona at Huehue (type loc.) and Kapulehu 

 (Gouveia). Molokai: Moomomi (Cooke & Pilsbry). Only 

 found fossil. 



The Hawaiian L. cyrta differs by the more regular shape of 

 the last whorl. L. kahoolavens'is has a continuous lower palatal 

 fold, among other differences. L. o. kona is nearly related to 



