LEPTACHATINA, GROUP N. 65 



seems to be related to L. lucida Pse. from Kauai. It is how- 

 ever, larger, thicker and more strongly sculptured. The em- 

 bryonic whorls are smooth and glossy, the aperture per- 

 pendicular. 



One specimen from Waialua has the following dimensions; 

 length 8, diam. 3.3, alt. of aperture 3.1. 



84. L. SEMICOSTATA (Pfeiffer). 



''Shell subumbilicate, dextral, turrited, somewhat solid, 

 closely costate, shining, chestnut corneous ; spire elongate, con- 

 vexly conical, somewhat obtuse; suture impressed; whorls 

 8y 2 , slightly convex, the last hardly equalling % of the length, 

 below the periphery smooth, pale, attenuate, base saccate- 

 compressed ; aperture slightly oblique, sinuately oblong ; colu- 

 mellar fold broad, oblique, white; lip simple, unexpanded, 

 margin of the columella reflexed, spreading throughout. 

 Length 9.5, diam. 4 mm." (Pfr.) 



Hawaiian Islands (Pfeiffer). 



Achatinella (Leptachatina) semicostata PFEIFFEB, P. Z. S. 

 London, 1855 (1856), p. 206; Mon. Hel. Viv., iv, p. 565. 

 NEWCOMB, Ann. Lye. N. Y., vi, 1858, p. 322, 330. Lepta- 

 chatina semicostata PEASE, P. Z. S., 1869, p. 651. 



A remarkable species with a very narrow aperture. I know 

 of no species to which it may be related, and from the shell 

 characters there is no clue as to which island it may have 

 come from. I agree with Mr. Sykes that this species is not 

 L. fusca Newc. as Newcomb suggested. 



85. L. LANCEOLATA n. sp. PI. 6, figs. 12, 13. 



The shell is imperforate, elongate, attenuately conic, yellow- 

 ish corneous, thin, subdiaphanous, glossy, under a lens regu- 

 larly and minutely striate or costulate. Spire acutely conic, 

 apex obtuse. Suture hardly impressed, narrowly margined, 

 slightly crenulate. Whorls 634, nearly flat, the last subcylin- 

 drical, tapering towards the base. Aperture slightly oblique, 

 perpendicular, pyriform. Columella nearly straight, with a 

 very oblique, minute fold. Outer lip slightly arcuate, slightly 

 thickened within, columellar margin reflexed, adnate. Length 

 6.0, diam. 2.4, length of ap. 2.4 mm. 



