ACHATINELLA SOWERBYANA. 177 



em collector will ever get. The shells are either plain except 

 for the sutural band (pi. 34, fig. 9, Kaipapau), or have a 

 band around the base, as in pi. 34, fig. 10 from Kaliuwaa val- 

 ley near the Castle trail. This shell measure, length 19.2, 

 diam. 10, aperture 9 mm. ; 6y 3 whorls. 



In one lot from the Kaipapau end of the Castle trail, no. 

 1866 Spalding 'coll., there are 20 of the plain typical form 

 with a sutural band only, 3 with a basal band. There is also 

 one chestnut specimen with a light sutural band. It has 

 also been taken by Mr. Thurston in the banana patch in Kai- 

 papau along the Castle trail towards Punaluu. 



Color-form oviformis ' Nc.' Pfr. PI. 34, fig. 11; pi. 30, fig. 

 11&. ' Shell sinistral, imperforate, ovate-conic, solid, striatu- 

 late, white under a glossy olivaceous epidermis, one to three 

 banded with brown. Spire convexly- conic, the apex rather 

 acute, white. Suture deeply margined. Whorls 5, scarcely 

 convex, the last about three-sevenths the total length. Aper- 

 ture nearly diagonal, ear-shaped; columellar fold moderate, 

 tooth-like, reddish ; peristome unexpanded, the margins joined 

 by a thin callus, the outer margin labiate within ; columellar 

 margin dilated, adnate. Length 17, diam. 8%, aperture 

 7% mm. long, 4 wide. Oahu, Newcomb ' (Pfr.). Type in 

 Pfeiffer's collection. 



Mr. Sykes hasr referred Pfeiffer's sinistral form of A. mul- 

 ticolor to -oviformis, no doubt correctly. Pfeiffer's figure is 

 reproduced in pi. 30, fig. lla. Specimens from Kaliuwaa are 

 three-banded with brown (" Hay's russet ") on a wax-yellow 

 ground, pi. 34, fig. 11, coll. by Spalding. It seems to be 

 merely a color-form or mutation of typical sowerbyana, 

 hardly worthy of a name. 



13a. A. SOWERBYANA THURSTONi P. & C., n. subsp. PI. 34, 

 figs. 13 to 14&. 



The shell is invariably sinistral; ground-color wax-yellow 

 below the periphery, white above it, with a band of burnt- 

 sienna bek)w the periphery. Sutural margin defined by a 

 deep line, usually with an inconspicuous, scarcely noticeable, 

 dark line next the suture. Apex generally tipped minutely 



