AMASTRA, MAUI. 293 



East Maui: Ulupalakua (Baldwin). 



Achatinella nigra NEWC., Proc. Bost. Soc. N. H., v, 1855, 

 p. 219 ; P. Z. S., 1855, p. 209 ; Amer. Journ. of Conch., ii, p. 

 210, pi. 13, f. 3. PPR., Monogr., iv, 545. THWING, Occas. 

 Papers, B. P. B. Mus., iii, no. 1, p. 177. BALDWIN, Cata- 

 logue, 1893, p. 9. Amastra nigra PSE., P. Z. S., 1869, 649 

 GULICK, Evolution, Racial and Habitudinal, pi. 1, f. 17. 

 Achatinella globosa GULICK, MS. teste Newc. 



The second embryonic whorl is nearly flat-sided, with 

 sculpture of rather strong curved riblets, and a carina above 

 the suture ; the next whorl has fine ribs, partly effaced in the 

 middle. The very globose last whorl is conspicuously mal- 

 leated, having flattened facets and irregular ridges running 

 spirally and descending. The spire is brown, but the last 

 whorl, under the lusterless blackish cuticle, is nearly white. 

 The cuticle is more or less varied with angular streaks on the 

 spire. The outer lip has a heavy rib or a thin callus within. 



Length 17, diam. 11.2 mm. ; whorls 6%. 



Length 15, diam. 10 mm. 



In one specimen received from Dr. Newcomb the whorl fol- 

 lowing the smooth initial half-whorl is convex, with a few 

 low coarse folds and some fine striae ; next whorl finely striate, 

 the striae partly effaced in the middle (pi. 43, fig. 3). In all 

 other respects the shell is a typical nigra. 



A. nigra is related to the West Mauian A. baldwiniana. 

 It has no other close relatives. 



93. A. SUBCRASSILABRIS n. sp. PL 45, figs. 14, 15. 



The shell is perforate, acutely ovate, solid, not glossy, out- 

 lines of the spire straight or very little contracted near the 

 summit; whorls nearly flat. Embryonic whorls very finely 

 striate, following whorls marked with growth-wrinkles, the 

 last one spirally malleate below the periphery in the type 

 (smooth in another specimen). Spire brown, the penultimate 

 whorl becoming paler, last whorl cream-white, retaining small 

 patches of a thin brown cuticle. Aperture slightly oblique, 

 white within, the lip thickened by a rather strong white rib. 

 Columella white, straight, narrowly reflexed, bearing a small 



