LEPTACHATINA, S.-G. PAUAHIA. 81 



drical for the last three whorls, the upper 5i/> somewhat con- 

 vex, apex minute, blunt. Suture simple, hardly impressed. 

 Whorls 81/2, the lower of the nepionic rather broader than 

 the early neanic, the latter flat, increasing very slowly in 

 size, the last two whorls nearly equal, very slightly convex, 

 the last nearly cylindrical, tapering towards the base. Aper- 

 ture narrowly pyriform, slightly oblique, acute and nar- 

 row above, somewhat angulate at the columella, nearly per- 

 pendicular, not diagonal. Columella nearly perpendicular, 

 truncate, with a rather small oblique fold which becomes 

 stronger about one whorl within. Outer lip erect, very 

 slightly thickened within, nearly straight; columellar margin 

 whitish, thin, appressed. A thin whitish callus unites both 

 margins. Length 7.2, diam. 3.2; length of ap. 3 mm. 



Oahu: Halawa, 1,500 ft. (Cooke) ; Mt. Tantalus 2,000 ft. 

 (Lyman). 



The form from Tantalus is smaller, smoother, with a yellow- 

 ish corneous color. This species is most closely allied to 

 L. chrysallis Pfr. The latter is, however, much larger, more 

 cylindrical in outline, with a stronger sculptured surface and 

 the aperture is much broader and more ovate. 



105. L. TANTILLA n. sp. PI. 13, figs. 5, 6, 7. 



The shell is minutely perforate, narrowly subcylindrical, 

 corneous, somewhat glossy, finely striate. with uneven strife, 

 somewhat wrinkled and more prominent near the suture. 

 Spire subcylindrical, gradually tapering towards the apex, 

 which is rather blunt. Suture simple, hardly impressed. 

 Whorls 7 1 / 2 , nearly flat, slowly and regularly increasing in 

 size, the last nearly cylindrical, tapering towards the base. 

 Aperture pyriform, slightly oblique, perpendicular. Colu- 

 mella nearly straight, scarcely truncate, with a very minute 

 oblique fold. Outer margin of lip erect, straight, arcuate 

 below, slightly thickened within ; columellar margin slightly 

 thickened, reflexed, free. Umbilicus minute, nearly circular. 

 Length 5.4, diam. 2.4; length of aperture 2.2 mm. 



Oahu: Waianae Mts. back of Leilehua (Cooke). 



This species is closely related to L. artata. It differs, how- 



