Original Descriptions of Achatinella. 179 



This species belongs to a group, at the head of which stands 

 A. rubens of Gould. Its specific character is sufficiently marked. 

 It is one of the three large species thus far obtained on the large 

 island of Hawaii. — Newc. 



Hab. Hamakua, Kau and Olaa. 



331. Achatinella henshawi Baldwin. 



Amastra henshawi Bald. Nautilus, Boston, 1903, p. 34. 



Shell dextral, imperforate or subperf orate, solid, ovately coni- 

 cal, apex subacute ; surface lustreless, striated with somewhat 

 irregular lines of growth; embryonic whorls under a lens showing 

 very delicate radiating sulcatious; color varies from light to very 

 dark brown, the upper w r horls 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 w T ithin; peristome acute, slightly thick- 

 ened within, extremities united with a thin, livid-white parietal 

 callosity; columella white, nexuous, abruptly terminating in a thin 

 lamellar plait. Length iS, diam. 10 mm; 



Found in damp woods at the roots of ferns and nearly buried 

 in trash, at altitudes of from 1800 to 4000 feet. — Bald. 



Hab. South Kona.— Bald. 



This seems to be the same as A. flavcscens Newc, found at 

 Hamakua and Kau. 



332. Achatinella senilis Baldwin. 



Amastra senilis Bald. Nautilus, Boston, 1903, vol. xvii, p. 35. 



Shell fossil, dextral, deeply perforated, the perforation pene- 

 trating to the apex; moderately solid, globose with a short conical 

 spire, apex acute; surface sculptured with coarse, irregular growth 

 lines, with a few irregular cross striae or ridges on the three lower 

 whorls ; embryonic whorls under a lens exhibiting delicate and 

 regular sulcations ; color of the living shell unknown; whorls 7, 

 convex; aperture sinuately oval, a little oblique; peristome simple, 

 acute, not thickened within, extremities joined by a thick parietal 

 calosity; columella terminating in a slight, nexuous fold. Length 

 23, diam. 18 mm. 



This and the following species were discovered and sent to me 

 by Mr. Eugene Horner, of Paauilo, Hawaii. They were found at 

 a place called Palihoukapapa, on the Hamakua slope of Mauna 

 Kea, at an elevation of 4000 feet. The shells were imbedded in 

 the earth about one foot below the surface. 



