LEPTACHATINA, GROUP E. 23 



oblique, slightly impressed. Whorls 6, slightly convex, the 

 embryonic rounded, the last cylindrical, tapering slowly to- 

 wards the base. Aperture elongate, pyriform, oblique, per- 

 pendicular. Columella brownish, twisted, with a very ob- 

 lique, minute basal fold. Outer margin of lip regularly arcu- 

 ate, very slightly thickened within and faintly edged with 

 dark brown; columellar margin thin, appressed, adnate. 

 Length 7.3, diam. 2.8, length of ap. 2.8 mm. 



Molokai: Mapulehu Ridge, Kaluaaha and Wailau Pali 

 (Thaanum). 



This species is represented by a single example from each 

 of the above localities. L. lanceolata, is the closest related 

 species from Molokai. L. molokaiensis differs, however, in 

 having a less number of whorls with its greater length, its 

 smoother surface, less conic spire, etc. It is more closely 

 related to L. convexiuscula Sykes from Oahu, from which it 

 is easily recognized by its slightly less cylindrical outlines, less 

 rapidly increasing whorls, smaller size, etc. 



28. L. OBSOLETA (Pfeiffer). PL 2, figs. 31, 32. 



"Shell subperf orate, oblong- turrited, thin, very faintly 

 striate, pellucid, glossy, pale corneous ; spire slightly convexly 

 turrited, obtuse; suture marginate; whorls 6y 2 , slightly con- 

 vex, the last forming % of the length; columella arcuate, 

 lightly twisted at the middle ; aperture scarcely oblique, ellip- 

 tically oval; lip simple, columellar margin very shortly re- 

 flexed, subadnate. Length 8.0, 'diam. 3 mm. Aperture 3.25 

 mm. long, 2.0 broad." (Pfr.) 



East Maui: Haleakala at 5000 feet (Perkins); floor of 

 Haleakala crater at about 8000 feet (Cooke). 



Spi-raoris obsoleta PFEIFFER, Proc. Zool. Soc. London, 1856, 

 p. 335; Mon. Hel. Viv., iv, p. 576. Leptackatina obsoleta 

 PEASE, Proc. Zool. Soc. London, 1869, p. 650. SYKES, Fauna 

 Haw., ii, 1900, p. 366. 



An interesting species, found at a higher altitude than any 

 other species of this genus so far reported. They were rather 

 abundant under stones near " Crystal Cave " on the almost 

 barren floor of the crater. Only seventeen adult specimens 



