LEPTACHATINA, GROUP I. 51 



Viv., viii, p. 218. Lept. (Labiella) pachystoma SYKES, Fauna 

 Haw. ii, 1900. p. 367. 



This species is separated from L. labiata Newc., by the 

 form of its aperture, which is more oblique, by its smaller 

 columellar fold, and by the callus which unites the two mar- 

 gins, and which forms a distinct rib instead of being uni- 

 formly spread over the whole surface." (Pse.) 



This species does not belong to the section Labiella, as the 

 very characteristic tooth within the outer lip has not been ob- 

 served in a single specimen. The rib-like callus is present 

 only in old specimens and is not peculiar to this species, as 

 this character may be found in gerontic specimens of nearly 

 all the heavier species of this genus, especially those from 

 Kauai. 



From a comparison of specimens (probably the types) of 

 L. pachystoma and L. turgidula. belonging to Pease's own col- 

 lection, which is now in the Museum of Comparative Zoology 

 in Cambridge, Mass., there is no doubt that the two cannot 

 be held as distinct species. It is thought best to reduce the 

 latter to varietal rank. 



65a. L. p. turgidula (Pease). PI. 8, figs. 50, 51, 52. 



The shell is usually a little longer, more solid, more cylin- 

 drical in outline than in typical L. pachystowia ; sometimes the 

 spire and upper portion of the last whorl are a reddish yellow 

 with a lighter yellowish base. Length 14.0, diam. 7.0, length 

 of aperture 6.4 mm. 



Labiella turgidula PEASE, P. Z. S. L., 1869, p. 651 (nom. 

 sol.) . Achatinella (Labiella) turgidula PFR., Mon. Hel. Viv., 

 viii, p. 219. Leptachatina turgidula PEASE, Journ. de 

 Conchyl., xviii. 1870, p. 89. CROSSE, Journ. de ConchyL, 

 xxiii, 1876. pi. 4, fig. 5. 



A large specimen from Milolii measures 16.2 x 7.5 mm. 



This variety is much more abundant than the typical form. 

 It is found in all the wooded region between Makaweli and 

 Milolii. 

 65&. L. p. cijlindrella n. var. PL 8, fig. 49. 



The shell is smaller, narrower, more cylindrical and much 



