82 AURICULELLA, OAHU. 



thickened, the outer margin arcuate, bordered on the outside 

 with white, the columellar margin reflexed over the umbilicus* 

 and connected with the outer margin by a rather thick green- 

 ish-white callus. Umbilicus large for the genus, nearly cir- 

 cular. Length 11, diam. 5.6 mm. 



Oahu: Mt; Olympus, at an elevation of about 2,500 feet 

 (Kuhns, Cooke) ; Konahuanui, at an elevation of 3,300 feet 

 (Kuhns, Spalding). 



The large size, distinct though fine striae, greenish color,, 

 etc., at once separate this species from any other. All the 

 specimens agree very closely in shape, size of umbilicus, etc. 

 Some of them have a lighter colored spire, only a shade darker 

 than the last whorl. The average length and diameter of 

 four adult specimens are 10.5 mm. long, 5.4 mm. diameter. 



This species differs from Auric, montana in color, form of 

 spire, size of umbilicus, texture of the surface, etc. From A. 

 pulchra it differs in size, form of aperture, the lip simply ex- 

 panded, not beveled or duplicate, the color and the more dis- 

 tinct striation. 



6. A. MONTANA Cooke, n. sp. PL 27, fig. 9. 



The shell is perforate, dextral (rarely sinistral) ; ovate; 

 with the spire cream-buff or ivory-yellow, the last whorl 

 opaque white; solid, glossy, under a lens very finely striate 

 with lines of growth. Spire conic with the outlines barely 

 convex; apex small. Suture simple, slightly impressed. 

 Whorls 6%, slightly convex, the last long, ovate, with taper- 

 ing base, somewhat flattened dorsally. Aperture white, auri- 

 form, not oblique, very slightly diagonal. Parietal lamella 

 rather thin, rather small, vertical. Columella thickened with 

 a rather small, almost horizontal thin lamella. Lip thickened, 

 the outer margin sinuously thickened, the lower spreading, 

 the columellar margin reflexed over the umbilicus. The colu- 

 mella and outer lip are united by a rather thick, smooth cal- 

 lus, with a transverse tubercle at the juncture. Umbilicus 

 ovate. Length 10.1, diam. 5.3 mm. 



Oahu: Mt. Konahuanui (Cooke). 



Variety, pi. 24, fig. 14; pi. 27, figs. 7, 8. Slightly more 



