Original Descriptions of Achatinella. 69 



scarcely reflected, arcuate ; columellar margin dilated, adnate ; 

 parietal margin wanting. 



Length 0.73 in. (18 1-2 mill.), breadth 0.40 in. (10 mill.). 



Length of body whorl 0.50 in. (13 mill.). 



Average weight 6.30 grains. 



Station on the leaves of the Naupaka {Scat'vola chamissoiana) 

 and other trees. 



Remarks. Helemano is the metropolis of the species, but it 

 is sometimes found in the other valleys above mentioned. — Gk. 



Hab. Ahonui, Wahiawa, Helemano, Kawailoa, and Wai- 

 mea. — Gk. 



This species includes the very light forms of the pulcherrima 

 group. 



96. Achatinella mahogani Gulick. 



A. mahogani Gulick. Ann. Lye. New York, vol. vi, 1858, p. 254, pi. viii, fig. 72. 



Shell dextral, imperforate, turreted, solid, shining, striate, 

 reddish chestnut ; apex obtuse, rose ; spire concavely turreted ; 

 suture lightly margined, moderately impressed ; whorls 6, convex ; 

 the last inflated, with the base black chestnut and regular^ 

 rounded ; columellar fold central, white, strong ; aperture trun- 

 cately auriform, white within ; peristome margined with brown, 

 thickened within ; with external margin scarcely reflected anteri- 

 orly, arcuate ; columellar margin dilated, adnate ; parietal margin 

 wanting. 



Length 0.81 in. (20 3-5 mill.), breadth 0.43 in. (n mill.). 



Length of body whorl 0.48 in. (12 mill.). 



Average weight 8.00 grains. 



Remarks. It lacks the black color of lip and suture which 

 characterizes A. melanostoma Newc. and A. limbata Nob., and also 

 differs in the general form and color. — Gk. 



Hab. Ahonui and Kalaikoa. — Gk. 



This includes the very dark chestnut forms. 



LIVIDA GROUP (CURTA GROUP). 

 97. Achatinella livida Swaiuson. 



A. livida Swain. Zool. 111., 1832, pi. cviii, fig. 2. 



A. testa sinistrorsa, ovata, obtusa, livide-fusca ; spira incrassata, sutura 

 fulva. 



Shell reversed, ovate, obtuse, livid brown, spire thickened, 

 suture fulvous. 



