288 AMASTRA, MAUI. 



Subsequent whorls strongly 'convex, brown, with slight 

 sculpture of low growth- wrinkles. Aperture quite oblique, 

 brown within, the outer lip scarcely thickened internally; a 

 white callus emerges, strengthening the basal lip within, its 

 inward portion showing through the shell as a yellowish or 

 whitish tract around the axial crevice. Columella straight, 

 its edge narrowly dilated, bearing a strongly oblique, rather 

 small lamella, which is stronger within; parietal film trans- 

 parent. 



Length 10, diam. 5, aperture 4 mm. ; 5% whorls. 



West Maui: Lahaina (Gulick). 



Smaller, more delicate than A. soror, with the whorls much 

 more convex, last whorl brown, not opaque and yellow or 

 whitish, except close to the perforation. Some shells of the 

 type lot (no. 57786, A. N. S. P.) are decidedly broader than 

 the type: Length 9, diam. 5.2, aperture 4 mm.; 5% whorls. 

 The largest shell seen is 10.5 mm. long. 



In the young and half -grown stages the periphery is ob- 

 tusely subangular, but the angle is usually not visible in 

 adults. The shell is usually dirty, but not 'copiously smeared, 

 as A. hutchinsoni generally is. 



88. A. L^VA Baldwin. PI. 48, figs. 12 to 15. 



" Shell sinistral, imperf orate, rather thin, conically tur- 

 rited, apex acute ; surface striated with fine incremental lines, 

 embryonic whorls with delicate radiating sulcations, color 

 brown, with irregular patches of a dark fugacious epidermis. 

 "Whorls 6, somewhat convex; suture well impressed. Aper- 

 ture oblique, oval, livid-white within. Peristome simple and 

 thin. Columella terminating in a thin lamellar plait. Length 

 12, diam. 5 mm." (Baldwin). 



East Maui : Mt. Haleakala. 



Amastra (Laminella) l&va BALDWIN, Nautilus, xix, April, 

 1906, p. 138. 



11 This species is the counterpart of Laminella soror, Nc. 

 found on West Maui, but the latter is a larger and more 

 obese shell " (Baldwin). 



The specimens figured are from a series sent by Mr. Bald- 



