LEPTACHATINA, GROUP E. 21 



with white; with margins joining in an unbroken curve; 

 dextral margin unreflected, arcuate; columellar margin di- 

 lated, not appressed ; parietal margin slightly callous. Length 

 6.3, diam. 2.8, length of body whorl 3.5 mm." (Gul.}. 



Oahu: Mokuleia, under stones in open fields. (Gul.) 



Achatinella saxatilis GTJLICK, Ann. Lye. N. Y., vi, 1856, p. 

 187, pi. 6, fig. 15. Achatinella (Leptachatina) saxatilis PFR., 

 Mon. Hel. Viv., vi, p. 186. Leptachatina saxatilis PEASE, 

 P. Z. S., 1869, p. 650. HARTMAN, Proc. A. N. S. Phila., 

 1888, p. 55. SYKES, Proc. Malac. Soc. London, iii, pi. 14, 

 fig. 17. 



"A small cylindrical species, of clear glassy appearance. 

 It represents more nearly than any other the Oahu species, the 

 A. gra.no, Newc. (found on East Maui), from which it differs 

 chiefly in its larger size, more elongate form, and glassy trans- 

 parency. From A. crystallina it differs in slender form and 

 smooth columella with umbilical cleft." (Gulick). 



From an examination of Gulick's type of this species we 

 find the last two whorls rapidly increasing, the columellar 

 fold is minute and deeply seated and the lip is remarkably 

 heavy for a shell of this type. 



25. L. EXOPTABILIS n. sp. PI. 10, figs, 5, 6. 



The shell is very minutely perforate, elongate, slender, in a 

 fossil state white, somewhat solid, under a strong lens min- 

 utely striate with lines of growth. Spire elongate, gradually 

 tapering towards the somewhat obtuse base. Suture simple, 

 hardly impressed, slightly oblique. Whorls 7%, nearly flat, 

 slowly and regularly increasing, the last cylindrical, tapering 

 towards the base. Aperture ovately pyriform, oblique, 

 slightly diagonal. Columella arcuate, with a distinct callus 

 along its face and a very minute, oblique, nearly basal fold. 

 Outer lip almost regularly curved, erect, thickened within, 

 columellar margin appressed and adnate for about % of its 

 length. Umbilicus very minute. Length 7.8, diam. 2.6, 

 length of ap. 2.6 mm. 



Oahu: Diamond Head (fossil); Waianae Mts. back of 

 Leilehua (Cooke). 



