Or^iginal Descriptions of Achatinena. 39 



Smaller, with outlines of spire less convex ; passing into 

 A. plnmata. Average weight 5.30 grains. 



Var. I. White, with numerous chestnut bands on the lower 

 part of the w'horls. 



Var. J. Light olive-brown, with dark bands. 



Var. K. Dark brown, with narrow white bands. 



Var. L. White, with one or two broad black bands at the base. 



Var. M. Elongate, white, with two black bands, one revolving 

 above the suture, the other entering the aperture, sometimes a 

 third accompanies the sutural margin. 



Var. N. White, with from three to five crowded bands at base. 



Var. O. Pure white. 



Remarks. May be grouped with A. buddii and A.fulgens 

 Newc, but differs in its more solid strudlure, its thicker lip and 

 columellar fold, and in the more convex outline of its sp^re. It 

 also lacks the black tip which chara(5lerizes A. buddii. The typi- 

 cal varieties found in Keawaawa are rare, the sterile regions afford- 

 ing but few trees, which occupy the ravines near the summit of 

 the ridge. 



The varieties of Kailua (I, J and K) pass into A. plumata 

 Nob.; and var. M of Olomana bears a strong analog}' to A. zonata 

 Nob. and A . formosa Nob., which are found at the opposite end of 

 the mountain range constituting the backbone of the island. — Gk. 



Hab. Species, and varieties A-H, Keawaawa ; vars. I-K, 

 Kailua ; vars. L-0, Olomana. — Gk. 



48. Achatinella plumata Gulick. 



A. plumata Gk. Ann. Lye. New York, vol. vi, p. 217, pi. vii, fig, 41. 



Shell sinistral, imperforate, ovate-conic, solid, shining, stri- 

 ated, cinereous, with oblique brown streaks ; apex subacute, spire 

 conic ; with outlines slightly convex ; suture marginate, moder- 

 ately impres.sed, white; whorls 6 1-2, somewhat convex; col- 

 umellar fold central, white, strong ; aperture somewhat oblique, 

 truncately auriform ; peristome subacute, well thickened within ; 

 with columellar margin dilated, adnate ; parietal margin wanting. 



Length 0.90 in. (23 mill.); breadth 0.48 in. (12 1-5 mill.). 



Length of body whorl 0.63 in. (16 mill.). 



Length of aperture 0.44 in. ( 1 1 mill.). 



Average weight 8,50 grains. 



