LEPTACHATTNA, GROUP N. 63 



The species cannot be confused with L. lucida Pease nor 

 L. knudseni. 



81. L. COSTULATA (Gulick). PI. 4, fig. 80. 



' ' Shell dextral, imperf orate, turreted oblong, shining, silky, 

 dark corneous, with a pale spiral band cutting the body whorl, 

 and revolving above the suture, minutely regularly ribbed; 

 spire turrited, with pale, obtuse apex; suture simple, moder- 

 ately impressed; whorls 7, convex; columellar fold central, 

 'brown; aperture pyriform; peristome simple; with dextral 

 margin unreflected, pale, laterally compressed, slightly arcu- 

 ate anteriorly ; columellar margin thin, brown, adnate ; parie- 

 tal margin very thin, white. Length 8.3, diam. 3.3, length of 

 body whorl 5.0 mm." (Gulick.) 



Oahu: Pupukee, Waimea and Kawailoa (Gulick). 



Achatinella costulata GULICK, Ann. Lye. N. Y., vi, 1856, 

 p. 177, pi. 6, fig. 5. NEWCOMB, Ann. Lye. N. Y., vi, 1858, 

 p. 322. Achatinella (Leptachatina) costulata PFEIFFER, 

 Mon. Hel. Viv., iv, p. 565. Achatinella (Leptachatina) semi- 

 costata PFEIFFER, Mon. Hel. Viv., vi, p. 184. Leptachatina 

 costulata SYKES, P. Malac. Soc. London, iii, pi. 14, fig. 4; 

 Fauna Haw., ii, 1900, p. 360. 



"Newcomb united this shell with L. semicostata Pfeiffer, 

 but Gulick 's type is much more slender than that species, the 

 mouth is of a different shape, and other minor differences 

 exist, all leading me to regard it as a good species." (Sykes.) 



This species is much more closely related to L. sculpta 

 Pfr. It differs, however, in its less attenuate and slightly 

 mows convex spire; the costaB are slightly finer and closer; 

 the color is brownish, while in sculpta the shell is straw color. 

 Figured from a cotype. 



82. L. OCTOGTRATA (Gulick). PL 9, fig. 13. 



"Shell dextral, scarcely perforate, ovately turrited, thin, 

 somewhat shining, translucent, dark corneous, very finely 

 but regularly striated ; apex obtuse, pallid ; spire conical, with 

 outlines slightly convex ; suture simple, moderately impressed ; 

 whorls 8, somewhat convex; columella light brown, with a 



