318 AMASTRA, HAWAII. 



109b. A. flavescens henshawi Baldwin. PL 47, fig. 15. 



" Shell dextral, imperf orate or subperf orate, solid, ovately 

 conical, apex subacute ; surface lustreless, striated with some- 

 what irregular lines of growth; embryonic whorls under a 

 lens showing very delicate radiating sulcations. Color varies 

 from light to very dark brown, the upper whorls generally 

 much darker than the body whorl; the lower whorls with 

 traces of a deciduous, brown epidermis. Whorls 6, somewhat 

 convex, the last one with a light carination at the periphery ; 

 suture well impressed. Aperture ovate, a little oblique, livid 

 white within; peristome acute, slightly thickened within, ex- 

 tremities united with a thin, livid- white parietal callosity; 

 columella white, flexuous, abruptly terminating in a thin 

 lamellar plait. Length 18, diam. 10 mm." (Baldwin). 



Hawaii : South Kona, in damp woods at the roots of ferns 

 and nearly buried in trash, at altitudes of from 1,800 to 

 4,000 feet. 



Amastra henshawi BALDWIN, Nautilus, xvii, July, 1903, p. 

 34. HENSHAW, Journ. Malac. Soc., Lond., vi, p. 121. Acha- 

 tinella henshawi Baldwin, THWING, Occ. Pap., P. B. P. Mus., 

 ii, no. 1, p. 179. 



" We take pleasure in dedicating this shell to Prof. H. W. 

 Henshaw, formerly of the Smithsonian Institution, Wash- 

 ington, D. C." (Baldwin). 



A specimen of the original lot, received from Mr. Baldwin, 

 is figured. These shells have the apex glossy, very faintly, 

 finely striate, but nearly as smooth as in A. flavescens. The 

 term " sulcations " used by Mr. Baldwin is misapplied. 

 There is only the least trace of angulation at the periphery 

 not enough to mention had it not been for Mr. Baldwin's 

 phrase. The aperture is oblique, white within, columellar 

 fold small and oblique. Cuticle brownish-yellow, thin, the 

 surface below it, exposed in front of the aperture, whitish or 

 very pale yellow. Early whorls slightly olivaceous. The 

 shell differs from A. flavescens chiefly by its slightly nar- 

 rower contour, and may without violence be ranked as a form 

 of flavescens. Mr. Thwing has expressed the opinion that they 

 are identical. Length 16, diam. 7.9, aperture 7 mm. ; 6 whorls. 



