AURICULELLA, OAHU. 81 



Length 7.3, oblique diameter 4 mm. 



4. A. AMCENA (Pfr.), Vol. XXII, pi. 30, fig. 3. 



''Shell subperf orate, ovately oblong, thin, slightly striate, 

 glossy, yellow, obscurely banded with a brown band; spire 

 convexly conical, apex slightly obtuse; suture impressed; 

 whorls 6^2, slightly convex, the last nearly equal to 3-7 of 

 the length, slightly attenuate at the base ; aperture oblique, 

 semioval j parietal lamella subtransverse ; columellar fold sub- 

 duplicate, calloused, a spiral lamina superposed; lip simple, 

 unexpanded. Length ll 1 /?, diam. 5 mm." (Pfr.) 



Sandwich Islands (Frick) ; Oahu: Halemano (Perkins). 



Achatinella amocna Pfr., P. Z. S. Lond., 1855, p. 2, pi. 30, 

 fig. 3; Mon. Hel. Viv., iv, p. 569; vi, p. 187; viii, p. 233.- 

 Frickella amcena Pfr., SYKES, Fauna Hawaiiensis, ii, Moll., 

 p. 379. Auriculella (section Frickella) amcena GULICK, P. 

 Z. S. Lond., 1873, p. 91. Auriculella amcena HARTMAN,, 

 Proc. A. N. S. Phila., 1888, p. 14. 



This shell is more or less related to A. montana. It differs 

 chiefly in its more elongately oval spire, size, etc. 



Probably the type is not quite mature, as the lip is thin. 

 There is no necessity of considering amocna as forming a spe- 

 cial genus or section, as it is closely allied to other species of 

 the group of A. auricula. The original figure was reproduced 

 photographically in Vol. XXII, pi. 30, fig. 3. 



5. A. OLIVACEA Cooke, n. sp. PL 27, figs. 10, 11. 



The shell is perforate-umbilicate, dextral, ovately conical, 

 rather solid; the last whorl is amber yellow, the rest brown 

 shading into the lighter color on the penultimate whorl, in- 

 side of the umbilical region white, a narrow white band ac- 

 companies the suture. The surface is glossy, distinctly stri- 

 ate. Spire conic, apex slightly obtuse. Suture slightly mar- 

 gined, scarcely impressed. Whorls 6%, nearly flat, the last 

 rotund, slightly elongate, convexly tapering at the base. 

 Aperture hardly oblique, nearly ovate, slightly diagonal., 

 Parietal lamella rather small, nearly vertical. Columella 

 simple, thickened, with a rather small lamella. Lip expanded, 



