292 AMASTRA, MAUI. 



carinate, 'but rarely these whorls are convex and striate. The 

 series is closely related to the pullata group of Molokai. 



91. A. BALDWINIANA n. sp. PL 43, figs. 4, 5. 



Shell imperforate globose-conic, moderately solid, very pale 

 brown or creamy-white under a thin, rather glossy dark- 

 brown, black-streaked cuticle, which is inconspicuous or want- 

 ing above the last whorl. When preserved on the penult, 

 whorl the .cuticle is irregularly mottled or angularly streaked, 

 as in A. nigra; and the light streaks of the last whorl show 

 traces of spiral bands. The substance of the shell is white 

 throughout or purplish-brown on the spire. The spire is 

 straightly conic or a little contracted near the summit. First 

 half- whorl smooth; next whorl strongly costate, and carinate 

 above the suture, the following whorl more finely costulate. 

 Later whorls with fine growth-lines, the last whorl smooth, or 

 sometimes spirally malleated, very convex. Aperture short, 

 white within, very slightly thickened within the outer lip. 

 Columellar lamella strong and very oblique. Parietal callus 

 thin. 



Length 22.7, diam. 13.1, aperture 10 mm.; 6% whorls. 



Length 21, diam. 13.5, aperture 10 mm.; Qy 2 whorls. 



Length 19, diam. 12, aperture 9 mm. ; 6^2 whorls. 



West Maui: Wailuku (D. D. Baldwin). 



A larger, less globose species than A. nigra, with the spire 

 more broadly conic, and the last whorl less malleated or 

 smooth. 



92. A. NIGRA (Newcomb). PL 43, figs. 1, 2, 3, 6. 



' ' Shell dextral, globosely acuminate, rather solid ; the two 

 lower whorls inflated, the superior ones subulate; whorls 6; 

 the last two cut upon the surface into rude cicatrices by lon- 

 gitudinal striae crossed by revolving elevations, irregularly 

 distributed; superior whorls flattened, with closely-crowded, 

 strong longitudinal striae; suture simple, well impressed; 

 aperture round ovate; columella short, terminating in a 

 lamellar tooth; color yellowish- white, with a thin black epi- 

 dermis. Length 14, diam. nine-twentieths of an inch 

 mm.] (Newcomb). 



