210 AMASTRA, OAHU. 



c 1 . Base brown, light above, stouter. 



A. s. nigrolabris, no. 48a. 

 c 2 . Shell whitish and rusty-brown. 



A. s. chlorotica, no. 48c. 



c 3 . Shell reddish-brown 1 with pale striae ; no dark 

 outer cuticle. A. porphyrea, no. 50. 



c 4 . Whitish, yellow or brown under a fragmen- 

 tary cuticle. 



d. Parietal callus purplish. 



A. porphyrostoma, no. 51. 

 d 1 . Not so colored. A. intermedia, no. 49. 



45. A. MICANS (Pfeiffer). PI. 37, figs. 5, 6, 7. 



Shell subperforate, dextral, turrited, rather solid ; white, 

 under a buff epidermis having a. varnish-like luster. Spire 

 regularly tapering, the apex rather acute; suture somewhat 

 crenated. Whorls 7, a little convex, the last scarcely more 

 than one-third the length, rotund. Colurnellar lamella rather 

 small, oblique. Aperture slightly oblique, suboval ; peristome 

 simple, unexpanded, the columellar margin a little dilated, 

 somewhat free. Length 16, diam. 7% mm (Pfr.). 



Sandwich Islands (Frick, in Cuming coll.). Oahu (Bald- 

 win, Huchison) ; back of Leilehua, Waianae valley (C. Mon- 

 tague Cooke). 



Achat-ineUa micans PFR., P. Z. S., 1859, p. 31; Monogr., vi, 

 179. Amastra micans PSE., P. Z. S., 1869, p. 650. HARTMAN, 

 Proc. A. N. S. Phila., 1888, p. 47, pi. 1, f. 10. BALDWIN, Cata- 

 logue, p. S). A. (Laminella) nncas SYKES, Fauna Hawaii- 

 ensis, p. 350. Amastra frosti Ancey, var. unicolor ANCEY, 

 Proc. Malac. Soc. London, iii, p. 269, pi. 12, f. 11, July, 1899. 



Hartmans figure was fro-m a specimen apparently identical 

 with "J.. frosti unicolor," some of which have exactly the 

 dimensions of micans, and seem to be entirely identical. 

 Since Sykes, who had access to the type specimens of both, 

 kept, them apart, and even in different subgenera, I give here 

 the descriptions of both. A. frosti, if my view is correct, 

 should be ranked as a color- variety of micans. 



A. frosti unicolor Ancey. PI. 37, fig. 4. "Shell shaped 



