236 AMASTRA, LANAI. 



57. A. NUCULA E. A. Smith. PI. 26, fig. 9 ; pi. 39, figs. 11, 12. 



' ' Shell globose-conic, dextral, striated with lines of growth, 

 partly lightly malleated, dirty whitish, partly covered with a 

 brown-olivaceous cuticle. Whorls 5%, the first 4% rather 

 flat, the last globose. Suture subcrenulate. Aperture whitish ; 

 peristome thickened; columellar fold thin. Length 12, diam. 

 8 mm. Habitat, probably on the island of Lanai." (Smith). 



Lanai mountains (Thwing) . 



Amastra nucula SMITH, P. Z. S., 1873, p. 85, pi. 10, f. 19. 

 Achatinella nucula Smith, THWING, Occas. Pap. B. P. B. Mu- 

 seum, iii, no. 1, p. 168, pi. 3, f . 20. 



' * In this species the apex is not strongly radiately sulcated, 

 as in A. malleata " (Smith). 



The unique type of this species (no. 89 Gulick coll., Boston 

 Society N. H.) is figured on pi. 39, figs. 11, 12, the original 

 figure ('copied in pi. 26, fig. 9) giving an inadequate idea of 

 the shell, though correct in outline. The first whorl has been 

 broken; the second is finely striate, the striae close, arcuate, 

 rather sharp and irregular. Subsequent whorls have light, 

 irregular growth-wrinkles, in places a little enlarged near the 

 suture, which however is not more crenulate than usual. The 

 last whorl has a delicate ridge at the periphery in front, 

 below which it is distinctly malleated, with f orwardly-descend- 

 ing facets. Above the periphery the malleation is much 

 weaker. Some specimens of A. nigra have a similar sculpture. 

 The outlines of the spire are straight, but if the first whorl 

 was present they would probably be a trifle concave. The 

 early whorls are flesh-colored, the last two very pale-brown 

 under a very thin, light, slightly yellowish-brown cuticle, 

 which is worn away in front of the aperture, and becomes 

 chestnut-colored close behind the outer lip. The aperture is 

 formed much as in A. pellucida or A. nigra. The columellar 

 lamella is subhorizontal, the curve below it deep and short, 

 and there is a rather strong but narrow rib within the outer 

 lip. Length, -as broken, 11.5, diam. 8.3, aperture 6.8 mm. 



This species has much the appearance of A. pellucida of 

 Oahu, except that it is malleated; the color, shape and aper- 



