LEPTACHATINA. 11 



stronger fold, and the parietal callus is much heavier. The 

 type lot was found just west of the crest of the ridge, some 

 distance north of the "Endodonta locality", on the steep, 

 shaded and leafy slope. So far as we know, it has not been 

 found elsewhere. 



L. SUBCYLINDRACEA Cooke. PI. 11, figs. 10 to 14. 



Vol. XXI, p. 28, pi. 3, fig. 59. The type of this species, 

 no. 57820 A. N. S. P., was found in a lot of L. oryza received 

 from Dr. Newcomb. It has the same texture and bluish- 

 white color as the associated oryza, and very likely came from 

 one of the roadside deposits in the region of Kahuku. One 

 from there is figured, pi. 11, fig. 10. 



The shell is solid and perforate. The surface is finely, 

 somewhat irregularly striate, the stride stronger and curving 

 backward near the suture. There is a broad margin visible 

 by translucence below the suture, but not otherwise defined. 

 The columellar lamella is small and deeply immersed. The 

 thick reflection of the columellar lip almost closes the per- 

 foration. The parietal callus is thick and terminates above 

 in a small tubercle, separated by a narrow channel from the 

 termination of the outer lip. Length 6.8, diam. 2.8 mm.; 6 l / 2 

 whorls. 



When only a few specimens of this species were known, 

 it was not unnaturally thought to be a form of L. oryza. 

 Now that hundreds of specimens have been found, it is easy 

 to see that it belongs to the group of L. fossilis of Kauai, 

 having the same peculiar parietal callus and posterior gutter. 

 The description is amplified above, from the type specimen. 



Oahu, in Pleistocene deposits : Punchbowl, about 300 ft. be- 

 low summit (Win. Alanson Bryan) ; Diamond Head, on the 

 ii.-w. and ocean sides, and within the crater; also in the sup- 

 posed raised reef, eastward (Cooke and Pilsbry). Coral bluff 

 near Kahuku (C. &P.). 



Molokai : Sand dunes of Moomomi, also near the summit of 

 Mauna Loa, at about 1350 ft. under stones, Holocene (Pilsbry 

 & Cooke). 



Kahoolawe: Pleistocene deposits of "Schooner Bay," on 



