LEPTACHATINA, GROUP' G. 45 



especially at the upper part of each whorl, imperforate or 

 covered subrimate. Spire convexly attenuate, conoidal, apex 

 minute, somewhat obtuse. Whorls 7, almost flat, regularly 

 increasing, suture line-like, pellucidly marginate; the last 

 oblong, regularly attenuate at the base. Aperture suboblique, 

 oblong, angled above, contracted below, furnished with quite 

 a strong columellar fold. Lip thickened, obtuse, at the colu- 

 mella above the place of the perforation slightly dilated with 

 callus, with the margins united with a callus. Length 9.0, 

 diam. 4.0, length of ap. 4.0 mm." (Ancey.) 



Maui: sand hills between East and West Maui (Baldwin). 



Leptachatina isthmica ANCEY, Proc. Malac. Soc. London, 

 iii, 1899, p. 270. SYKES, Proe. Malac. Soc. London, iii, 1899, 

 pi. 13, fig. 20. 



L. isthmica is more closely related to L. compacta Pse., than 

 to any other species. Specimens referred to the latter species 

 differ mainly in having a shorter spire and two whorls less. 

 Mr. Sykes' figure of a type is copied on plate 2. A topotype 

 is drawn on plate 12. 



58. L. KONAENSIS Sykes. PI. 1, figs. 1, 2, 3. 



"Shell elongately ovate, imperforate, dextral, somewhat 

 thin, corneous or pale corneous, finely longitudinally striate, 

 apex slightly obtuse; whorls 6, flat, the last equal to % the 

 length of the shell; suture impressed, marginate; aperture 

 sinuately ovate, columella arcuate, dextral margin thickened 

 within, columellar margin subreflexed, furnished with a small 

 ascending fold. Length 8.0, diam. 4.0 mm." (Sykes). 



Hawaii: Kona at 4000 feet (Perkins) ; Waimea (Baldwin, 

 Lyons, Thaanum) ; Hamakua (Baldwin). 



Leptachatina konaensis SYKES, Fauna Haw., ii, 1900, p. 

 364, pi. xi, fig. 13. 



The shells from Waimea agree closely with the type in the 

 British Museum. Fig. 3 is a copy of the original illustration. 



58a. L. k. olaaensis n. var. PI. 1, fig. 4. 



The shell is larger, heavier, thicker, more coarsely striate 

 than typical specimens, and of a dull dirty yellow color. 



