AMASTRA, MOLOKAI. 275 



77a. A. N. DISSIMILICEPS n. subsp. PI. 28, figs. 19, 20. 



Shell oblong, similar to A. mucronata in size and general 

 shape, but the long spire has more convex outlines. Em- 

 bryonic whorls purple-brown, convex, with somewhat finer 

 sculpture than A. (simularis) mucronata and not showing 

 the keel above the suture. Ground-color of the later whorls 

 cream or slightly flesh- tinted ; cuticle entire on the last half- 

 Whorl, brown with black streaks; on the preceding l 1 /^ or 2 

 whorls it is largely deciduous, but where retained it forms a 

 rather coarse, irregular tracery, similar to some examples of 

 A. uniplicata, and unlike the angular striping of A. mucro- 

 nata. Aperture pink within (fig. 20) or blue- white (fig. 19). 

 6!/2 whorls. 



Fig. 20. Length 17.5, diam. 8.2, aperture 7.3 mm. (type). 



Fig. 19. Length 16.3, diam. 8, aperture 7 mm. 



Molokai : Type no. 2047, coll. C. M. Cooke. 



A longer, more solid shell than A. nubifera, but like that 

 in the color, shape and sculpture of the embryonic whorls. 



78. A. MODESTA (C. B. Adams). 



' Shell rather thick and short, ovate-conic; dingy reddish 

 or ash brown ; more or less covered with a dingy dark-brown 

 epidermis; with fine irregular transverse strise, which are 

 coarser on the upper whorls ; without spiral stride ; apex sub- 

 acute ; spire short, with the outlines quite curvilinear ; whorls 

 six, moderately convex, with a well impressed suture; last 

 whorl rather ventricose ; aperture ovate, somewhat acute 

 above ; lip sharp, not expanded, moderately thickened within ; 

 columellar fold well developed, quite opaque. Mean diver- 

 gence 50 degrees. Length .54, breadth .3, length of aperture 

 .26 inch." [= length 13.5, diam. 7.5, aperture 6.5 mm.] 

 (Ad.) 



Sandwich Islands (Adams). 



Ackatinella modesta C. B. AD., Ann. Lye. N. H. of N. Y., v, 

 p. 44; Gontrib. to Conch., no. 8, p. 128 (Oct. 21st, 1850).- 

 PFR,, Monogr., iii, p. 457. BALDWIN, Catalogue, p. 9 (Molo- 

 kai). 



The type of A. modesta has not been figured, and its recog- 



