I20 Original Descriptions of Achatinella. 



times decollated; whorls 6 1-2, convex, margined above; the last 

 inflated, equal to 66-100 of the length; columella white, plaited 

 near the whorl, strongly twisted, not tuberculate; aperture rounded; 

 peristome expanded, refledled, very slightly thickened; with colu- 

 mellar margin reflected, adnate, or slighth' detached ; parietal 

 margin wanting. 



Length 0.90 in. (23 mill.), breadth 0.51 in. (13 mill.). 



Length of aperture 0.40 in. (10 mill.). 



Weight 6.00 grains. 



Remarks. This species differs from A . fasciata Nob. , to which 

 it is closely allied, in the concave outlines of the spire, in its in- 

 flated body whorl, and more expanded and reflected lip. — Gk. 



Hab. Honokowai.— (S. T. Alex.)Gk. 



Mr. Baldwin places this with tappaniana Ad. 



PERDIX GROUP. 

 194. Achatinella perdix Reeve. 



A. perdix Rve. Rve. Couch. Icon. Achat., I<ondoii, 1S50, .sp. 43. 



Shell ovate, veutricose, rather thin, dextral. spire exserted, 

 somewhat obtuse at the apex; whorls 6 in number, convex, mar- 

 gined round the upper part, obliquely sculptured flexuous im- 

 pressed lines; columella plicatel}- twisted, rather callous; whitish, 

 painted and variegated throughout with olive-brown, sutures and 

 columella white. 



Animal bluish white; upper tentacles and sheath slate-colored; 

 basal margin of foot bordered with light slate; bottom of foot and 

 mantle greenish white; when extended, not longer than the shell. 

 Few species of the genus pass through a greater variety of changes 

 than this, in form and markings. M}" colledlion numbers over 

 twenty, which may fairly be classed as varieties. Of many of 

 them I have examined the animal, and find no difference in color, 

 or so slight as to call for no special notice. — Newc. 



Hab. Lahaina. — Bald. 



195. Achatinella pyramidalis Gulick. 



A. pyramidalis Gk. Ann. Lye. New York, vi, 1S56, p. 204, pi. vii, fig-. 32. 



Shell dextral, very rarely sinistral, imperforate, pyramidal, 

 rather solid, shining, chestnut or ash-brown, with a white or yel- 

 lowish band encircling the base, with oblique white or brown 

 markings on the second and third whorls, bluish white within the 

 aperture; apex subacute; spire regularly conical, sometimes de- 



