ACHATINELLA BULIMOIDES. 161 



" Shell dextral or sinistral, elongately ovate; whorls 6, 

 slightly margined above, rounded; suture moderately im- 

 pressed. Aperture subovate, entirely margined with black; 

 columella short, plicate, strong and twisted ; lip thickened and 

 slightly expanded. Color of shell pure white or yellowish- 

 white, with or -without obsolete brownish bands above. Length 

 eighteen-twentieths, diam. ten-twentieths inch. Hab. Kahana, 

 Koolan, Oahu ' (Newcomb, 1854). 



Oahu: Kahana (Newcomb) ; Kahana and Hakipuu (Gu- 

 lick) . 



Achatinella ovata NEWCOMB, Ann. Lye. N. H. of N. Y., vi, 

 p. 22, May, 1853 ; P. Z. S., 1853, p. 130, pi. 22, f . 2, 2a, 1854. 

 GULICK, Evolution, Racial and Habitudinal, p. 41, pi. 3, f. 

 6/1-15/t. Achatinella Candida PFR., P. Z. S., 1855, p. 2, pi. 30, 

 f. 4; Monogr., iv, 519. Achatinella vidua PFR., P. Z. S., 1855, 

 p. 3, pi. 30, f. 10; Monographia, iv, 522. Cf. Newcomb, Ann. 

 Lye. N. H. of N. Y., vi, p. 324. A. ivheatleyi NEWCOMB, Ann. 

 Lye., vi, pp. 147 (1855) and 324 (1858), not described (see 

 under A. elegans ivheatleyana). A. fricki var. d, PFR., Mon- 

 ogr., iv, 521 ; P. Z. S., 1855, pi. 30. f . la. 



Dr. Newcomb included both white and banded forms in his 

 description and figures, which are reproduced on pi. 29, figs. 

 2, 2a. They occur in the same hybrid colony in Kahana, pi. 

 28, figs. 1 to \d ; pi. 33, fig. 2. The surface is not very glossy, 

 often rather distinctly striate. The apex is light colored, yel- 

 lowish, pale-brown or white. The suture has no dark border 

 below, and the impressed line defining the margin is usually 

 rather weak, sometimes wanting. Outside the lip has a dark 

 border behind, as in pi. 28, fig. 1&, though not always so fully 

 developed. The lip is distinctly expanded outwardly and es- 

 pecially below, and has a 'chocolate edge, both outside and 

 within. The internal callus is rather strong. In all color- 

 forms 'at Kahana the shell may be either dextral or sinistral. 



Length 23, diam. 13 mm. ; 6% whorls. 



Length 22.5, diam. 13.5 mm. 



Length 21.5, diam. 12 mm. 



Length 18, diam. 11 mm. 



Banded specimens would probably prove smaller than white- 



