Descriptions of JVew Species of Achati/nella. 213 



somewhat obtuse, tessellated with white and chestnut; spire 

 regularly conical ; suture simple, moderately impressed ; whorls 

 nearly 7, convex ; the last regularly rounded, equal to tVV-tVo 

 of the length ; columella strongly plaited above ; aperture 

 semiorbicular, brownish-white within ; peristome thickened 

 within, scarcely reflected anteriorly ; with columellar margin 

 white, and reflected over the deep perforation ; parietal margin 

 wanting. 



Length 0.85 inch (21f mill.) ; breadth 0.47 inch (12 mill.). 



Length of aperture, 0.36 inch (9 mill.). 



Average weight 5.50 grains. 



Var. b. — With apex corneous, without tessellations; very 

 rare. 



Var. c. — Ventricose ; spire short, curvilinear. A small spe- 

 cimen has the following dimensions : — 



Length 0.67 inch (17 mill.) ; breadth 0.42 inch (10| mill.). 



Length of aperture 0.30 inch (7f mill.). 



Weight 4.50 grains. 



Station. — On the Kukui {Aleurites triloba). E. Bailey, Jr. ! 

 Habitat. — Wailuku, Maui ; rare. E. Bailey, Jr. ! 



Remarks. — This species passes into A. Gouldii Newc. Much 

 handling gradually removes the epidermis from the shell, leaving 

 the surface more or less polished. 



39. Achatinella plumbea. 



Plate VII. Fig. 39. 



T. dextrorsa, interdum perforata, ovato-conica, solida, nitida, irregula- 

 riter striata, levissime decussata, plunibeo-cinerea, basi fascia una alba 

 cincta ; apice subacuta ; spira conica, ; sutura marginata, valide impressa, ; 



DECEMBEB, 1866. 25 Ank. Ltc. Nat. Hist. Vol. YL 



