Original Descriptions of Achatinella. I'-jC^ 



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

 A. rubens of Gould. Its specific charadler 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. 



Amaitra hensliazi.'i Bald. Xautilus, Bostou, 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 

 ver}' 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, slighth' thick- 

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

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

 lamellar plait. Length i8, diam. lo 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 Koua.— Bald. 



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

 Hamakua and Kau. 



332. Achatinella senilis Baldwin. 



Ama:>tra icniiis Bald. Xautilus, 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 sinuateh* oval, a little oblique; peristome simple, 

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

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

 23, diam. 18 mm. 



This and the following species were discovered and sent to me 

 b}^ 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. 



