AMASTRA, MOLOKAI. 263 



Length 21.5, diam. 14, aperture 11.9 mm. ; 6y 2 whorls. 

 Length 21.9, diam. 13.5, aperture 11.6 mm.; 6y 2 whorls. 

 Other specimens are ochraceous, with small shreds of the 

 dark outer cuticle (pi. 37, fig. 21). 



71a. Var. subnigra n. v., pi. 27, figs. 19, 20, 21. 



Similar to the preceding but smaller, the upper part of the 

 spire is purplish-brown; under-cuticle orange or pale yellow 

 under the more or less deciduous blackish layer. Shape 

 variable. 



Fig. 19. Length 18.5, diam. 10.9, aperture 9.1 mm. ; whorls 



Fig. 21. Length 18, diam. 11, aperture 10 mm. ; whorls 6. 

 Length 20.3, diam. 11, aperture 9.6 mm.; whorls 6% (cotype). 

 Length 19.3, diam. 11, aperture 9.5 mm. (cotype). 

 Molokai : Cotypes 2095 Cooke coll., and 105516 A. N. S. P. 



71b. A. p. umbrosa Baldwin. PL 37, figs. 14, 15, 16. 



The shell is globose-'conic, moderately solid, imperforate, 

 soiled or isabella-white, covered with an olivaceous-brown, 

 black streaked, slightly glossy cuticle, which is irregularly 

 streaked with whitish and marked with some triangular spots, 

 or on the last half of the last whorl is sometimes nearly con- 

 tinuous; the denuded apex being red-brown or dark purple. 

 Spire straightly conic, the whorls but very slightly convex. 

 Embryonic whorls flat, conic, the first half -whorl smooth, next 

 half-whorl coarsely but rather weakly plicate, but showing 

 no supersutural keel, following whorl finely plicatulate. 

 Later whorls are marked with growth-wrinkles ; the last whorl 

 'has more or less malleation in a spiral direction, is inflated, 

 and descends a little in front, The aperture is white within, 

 outer lip thickened within the acute edge. Columella white. 

 calloused, bearing a stout, subhorizontal lamella below the 

 middle. Parietal callus very thin. 



Length 19.5, diam. 12.9, aperture 10 mm. ; 5% whorls. 



Length 21, diam. 12.5, aperture 10.2 mm. ; 6 whorls. 



" Animal extended in motion longer than the shell. Mantle 

 dark brown with a margin of lighter shade. Foot light 

 brown, the superior portion and sides studded with large 



