LEPTACHATINA, GROUP G. 43 



corrected to 4/20 inch. (5.0 mm.). Specimens presented by* 

 Dr. Newcomb to the Philadelphia Academy have the fol- 

 lowing measurements : 



Length 10.1, diam. 4.9, length of aperture 4.7 mm. 



Length 9.9, diam. 4.7, length of aperture 4.5 Tnm T 



Length 8.8, diam. 4.3, length of aperture 4.1 mm. 



Under a lens the shells are minutely striate and in some of 

 the specimens there is a faint spiral band at the periphery; 

 the aperture is very slightly diagonal; one of the specimens 

 is of a uniform reddish brown color. The shells collected 

 by Mr. Perkins on Oahu are not typical and possibly belong 

 to another species. They come pretty close to L. capitosa. 



Borcherding's specimens from Molokai probably equal 

 Lept. coruscans Hartm. 



54a. L. n. Occident alis n. var. PL 2, fig. 22. 



The shell is slightly broader in proportion to its length 

 than L. nitida, thicker, darker colored, except the embryonic 

 whorls, less shining. Whorls 6, the first 4 closely coiled and 

 flat, the two last increasing rapidly, tumid. Aperture per- 

 pendicular. Columella nearly straight, with a rather strong 

 almost transverse fold. Outer lip thickened, white; parietal 

 margin with a rather thick polished callus. Length 10.0, 

 diam. 5.1, length of ap. 5.0 mm. 



West Maui. Maunanahoomaha (Thaanum, Cooke) ; Lahaina 

 (Baldwin). 

 55. L. PR^STABILIS n. sp. PI. 2, figs. 37, 38. 



The shell is imperforate, elongately oval, corneous, with 

 a narrow reddish line accompanying the suture, glossy, solid, 

 distinctly striate, especially just below the suture. Spire 

 elongate, with slightly convex outlines, apex obtuse. Suture 

 slightly impressed, margined. Whorls nearly 7, slightly 

 convex, regularly increasing, the last subcylindrical, taper- 

 ing to the base. Aperture broadly ovate, oblique, slightly 

 diagonal. Columella nearly straight, white, with a rather 

 strong oblique fold extending to the margin. Outer lip 

 strongly arcuate, slightly thickened within, whitish; colu- 



