LEPTACHATINA, GROUP H. 47 



Length 11.7, diam. 6.3, length of apert. 6.1 mm. Palehua. 

 Length 12.5, diam. 6.3, length of apert. 6.0 mm. Lihue 

 (Baldwin's coll.) 



60. L. DIMIDIATA (Pfeiffer). PI. 5, figs. 93, 94, 95, 96. 



"Shell imperf orate, ovately conic, somewhat solid, slightly 

 striate, glossy, blackish chestnut above; spire convexly conic, 

 apex somewhat obtuse ; suture light, subcrenulate ; whorls 6^, 

 somewhat flat, the last a little shorter than the spire, from 

 the middle to the base pale corneous; aperture scarcely 

 oblique, sinuately oval, unicolorous within; columellar fold 

 callous, suboblique; lip white, not expanded, thickened with- 

 in; columellar margin narrow, adnate. Length 11.0, diam. 

 5.5 mm." (Pfr.) 



"Var. &. With the last whorl unicolorous chestnut, spire 

 paler." (Pfr.) 



Oahu: Halemano, Kawailoa Gulch (Perkins); Waialei, 

 Kawailoa, Kalaikoa (Gulick). 



Achatinella (Leptachatina} dimidiata PFR., P. Z. S. Lon- 

 don, 1855, p. 205. Mon. Hel. Viv., iv, p. 564; vi, p. 184; 

 viii, p. 246. Leptachatina, dimidiata PEASE, P. Z. S. London, 

 1869, p. 651. Leptachatina cingula HARTMAN, Proc. A. N. S. 

 Phila., 1888, p. 52, pi. 1, fig. 14. SYKES, Fauna Haw., ii, 

 1900, p. 359. 



I am quite sure that Pfeiffer's species cannot be referred 

 to L. cingula Migh. L. dimidiata is shorter with a somewhat 

 narrower aperture, and the color patterns are entirely 

 different. 



The most abundant color-variety is not mentioned by 

 Pfeiffer. The shell is whitish-corneous, with a rather broad 

 chestnut band just above the periphery and continued on 

 the spire above the suture. 



Two specimens have the following measurements: 



Length 9.9, diam. 5.5, length of apert. 5.2 mm. 



Length 11.2, diam. 5.8, length of apert. 5.5 mm. 



61. L. PYEAMIS (Pfeiffer). PI. 3, figs. 43, 44. 



"Shell ovately pyramidal, very lightly striate, diaphanous, 



