LEPTACHATINA. GROUP F. 27 



pressed ; whorls 6, rather convex ; columellar fold central, pale 

 corneous, scarcely lamelliform ; aperture sub-pyrif onn ; peris- 

 tome margined with white and thickened within ; with dextral 

 margin arcuate, very slightly reflected anteriorly; columellar 

 margin dilated, adnate; parietal margin thin. Length 7.6, 

 diam. 4.3, length of body whorl 5.3 mm." (Gulick.) 



Oahu: Mokuleia, Lihue, (Gulick); Olomana (Gulick on 

 label, Mus. Bost. Soc.) ; Punaluu, Hauula, Helemanu, Kailua, 

 Waimanalo (Gulick, for A. fragilis) ; Palolo, Bound Top, 

 Mt. Tantalus, Pauoa, Nuuanu (Cooke). 



Achatinella gummea GULICK, Ann. Lye. N. Y., vi, 1856, p. 

 182, pi. 6, fig. 10. Achatinella fragilis GULICK, Ann. Lye. 

 N. Y., vi, 1856, p. 182, pi. 6, fig. 11. Achatinella guttula 

 NEWCOMB, Ann. Lye. N. Y., vi, 1858, p. 315. Achatinella. 

 (Leptachatina) gummea PFEIFFER, Mon. Hel. Viv., iv, p. 566; 

 vi, p. 184; viii, p. 247. Leptachatina gummea SYKES, P. 

 Malac. Soc. London, iii, pi. xiv, fig. 1. Leptachatina fragilis 

 SYKES, P. Malac. Soc. London, iii, pi. xiv, fig. 2. Lepta- 

 chatina guttula SYKES, Fauna Haw., ii, 1900, p. 363. 



This is the commonest and most widespread species of 

 Lepta-chatina on the Island of Oahu. It is nearly always 

 present in the more or less open woods near forests, though 

 it sometimes occurs in the damper and darker regions but not 

 so abundantly. 



I think that Newcomb, in his identification of L. guttula 

 Gld., must have been mistaken, for typical shells of this 

 species are entirely different from gummea. Gould's species 

 is heavier, thicker, with a more ovate spire, the last whorl is 

 more tumid and tapers more at the base, the lip is much more 

 thickened and the columellar fold is smaller and more deeply 

 seated than in L. gummea. 



The species differs considerably in size as can be seen by 

 the following measurements : 



Length 7.8, diam. 4.0, length of apert. 3.6 mm. Nuuanu. 



Length 9.8, diam. 4.9, length of apert. 4.8 mm. Nuuanu. 



Length 6.8, diam. 3.8, length of apert, 3.6 mm. Round Top. 



Length 8.5, diam. 4.5, length of apert, 4.2 mm. Palolo. 



Length 7.6, diam. 4.0, length of body whorl 5.3 mm. (Gulick 

 for A. fragilis.) 



