160 ACHATINELLA BULIMOIDES. 



Apex rather obtuse, chestnut-brown ; spire convexly conical- 

 suture marginate, moderately impressed; whorls 6%, convex. 

 Columellar fold central, white, strong. Aperture truncately 

 auriform, white within ; peristome thickened within, with ex- 

 ternal margin slightly reflected anteriorly, arcuate, white or 

 brown ; columellar margin reflected, detached, white ; parietal 

 margin very thin. Length 20%, breadth 11 Vs nim. Average 

 weight 7 grains. Kahana, Oahu, on trees " (Gulick) . 



' ' Sinistral specimens are sometimes found which resemble 

 A. obliqua, but are readily distinguished by the darker 'color- 

 ing around and upon the lip. I have from Hauula a few spec- 

 imens which seem to belong to this species. Some of them 

 are nearly white " (Gulick). 



This dextral form of obliqua has the same peculiar colors, 

 drab, dull-brown overlaid with lilac, etc., but also sometimes 

 the chestnut-brown of A. ovata. It has another ovata char- 

 acter in the two-banded pattern of many shells of the typical 

 colony. This pattern is not found in the typical colony of 

 A. obliqua, judging 'by a lot of about 50 shells seen, though it 

 occurs in a smaller brown-lipped lot in the Gulick collection. 

 The form oomorpha often has exactly the coloration of typical 

 obliqua, except that the lip is brown both externally and 

 within. PI. 28, fig. 10& is the typical oomorpha pattern ac- 

 cording to Gulick 's figured type, two-banded over a streaked 

 ground. Shells also occur having the last whorl white. The 

 length varies from 19 to 22.5 mm., but most specimens before 

 me are smaller than obliqua. 



9d. A. BULIMOIDES OVATA Newcomb. PL 28, figs. 1 to Id, 2; 

 pi. 29, figs. 2, 2a ; pi. 33, fig. 2. 



' ' Shell dextral, elongate-ovate, polished, finely striated lon- 

 gitudinally. Color light flesh-colored above, last two whorls 

 white, obscurely banded with light-brown. Whorls 6, convex ; 

 suture slightly impressed, margined. Aperture subovate; 

 columella twisted into a plait, slightly callus ; lip slightly re- 

 flected, dark-brown. Length 0.9 inch. Breadth 0.45 inch. 

 Variety a : shell white, bluish-white above, without coloring or 

 bands. Habitat, Waiauai, Oahu " (Newcomb, May, 1853). 



