24 LEPTACHATINA, GROUP F. 



were gathered, three of which have a remarkable development. 

 Near the base of the columella is a low blunt spiral callus on 

 the parietal wall and extending into the aperture. This may 

 be a senile character, though two of the specimens do not show 

 any other signs of senility. This thickening has not been 

 observed in any other species. 



In fresh adult examples the outer lip and columella are 

 edged with dark brown. A few have the parietal callus min- 

 utely parallel-striate. Adult specimens from a single colony 

 vary between the following measurements : Length 7.9, diam. 

 3.1, length of ap. 2.9 mm. Length 8.7, diam. 3.3, length of 

 ap. 3.3 mm. Length 8.8, diam. 3.4, length of ap. 3.2 mm. 



This species is related to L. exilis Gul. and L. convexius- 

 cula Sykes, both of which come from the island of Oahu. 



F. Group of L. accincta. 

 29. L. BREVICULA Pease. PI. 8, fig. 54. 



"Shell dextral, somewhat thin, imperf orate, pyramidal or 

 shortly ovate, very minutely, longitudinally striate, corneous ; 

 whorls 5-6, somewhat flat, marginate at the suture; aperture 

 obauriform; columellar fold white, compressed, subbasal, 

 strong, almost transverse; lip scarcely thickened. Length 

 8.0, diam. 4.0 mm." (Pse.) 



Kauai (Pease) : Kaholuamano, and at 4000 ft. (Perkins). 



L. brevicula PSE., Journ. de Conchyl., xvii, 1869, p. 169. 

 SYKES, Fauna Haw., ii, p. 358. Achatinella (Leptachatina) 

 brevicula PFR., Mon. Hel. Viv., viii, p. 246. 



An example, sent by Pease to the Acad. N. S. Phila., has 

 the following measurements: Length 7.3, diam. 3.9, length 

 of aperture 3.5 mm., with 6% whorls. The species is closely 

 related to L. gummea Gul. from Oahu. 



29a. L. b. micro, n. var. PI. 8, fig. 55. 



The shell is much smaller and proportionally, and more 

 obese than typical specimens of L. brevicula. Length 6.1, 

 diam. 3.1, length of aperture 2.8 mm. 



Kauai: Haleieie at 1700 ft. and Milolii at 1500 ft. (Cooke). 



