AMASTRA, MAUL 301 



This may be specifically distinct from A. affinis, as Hyatt 

 believed ; but variation in this group is so imperfectly 

 understood that for the present it may be described as a sub- 

 species. 



96e. A. a. kaupakaluana n. subsp. PI. 46, figs. 1 to 6. 



The shell is imperf orate, oblong-conic, rather solid; pale 

 yellowish, becoming brown on the spire or near the apex, in 

 large part covered by a thin, smooth olivaceous cuticle, often 

 marked with dark oblique stripes on a paler ground on the 

 front, and becoming denser and chestnut-colored on the last 

 part of the last whorl. It is worn away in front of the 

 aperture. First whorl costate and carinated, second whorl 

 much more finely costulate ; subsequent whorls somewhat 

 plicatulate below the suture. Aperture impure white within, 

 often pinkish towards the black lip-edge. Columellar fold 

 small, obtuse, median. 



Length 16, diam. 8.9, aperture 7.6 mm. ; 6% whorls. 



Length 16, diam. 8.3, aperture 7.3 mm. ; 6!/2 whorls. 



East Maui : Kaupakalua (Baldwin). Cotypes no. 2156, 

 coll. C. M. Cooke. and 104760, A. N. S. P. 



Darker colored than A. affinis, retaining more cuticle, and 

 rather different in pattern ; it has an appearance of distinct- 

 ness. Inhabits a district north of Kula, the home of A. 

 affinis. 



Two other lots in the Cooke collection without exact locality 

 data are referable to this subspecies. In lot 2150 the shell 

 is rather solid, obese, length 15, diam. 9 mm., 'Cuticle blackish, 

 the mouth rose or white (pi. 46, figs. 1, 2). In lot 2149 the 

 shell is thinner, cuticle black (pi. 46, figs. 3, 4). 



97. A. NANA Baldwin. PL 43, figs. 11, 20, 21. 



The shell is rimate, ovate-conic, thin; impure whitish or 

 pale brown, the apex dark brown, covered (except in front 

 of the aperture) with a brown or olivaceous-brown cuticle, 

 which is varied with light streaks or zigzag stripes. Em- 

 bryonic shell costate and carinate, later whorls more or less 

 irregularly wrinkle-striate. Aperture small, the lip some- 



