ACHATINELLA BYRONII. 135 



locality, pi. 27, figs. 1, la. representing typical shells. Tire 

 chestnut subsutural band is invariable in Ahonui and Kalai- 

 koa shells. 



In a lot of 68 from Ahonui, Gulick coll., the colors are as 

 follows : 



1. Typical, green-streaked (pi. 27, figs. 1, la), 16 shells. 



2. Yellowish or olivaceous tawny, clear or more or less 

 roughened and streaked with black (figs. 1&, Ic), 18 shells. 



3. Like 1 or 2, but having spiral bands, at periphery and 

 midway between sutures, sometimes not extending to the last 

 whorl (fig. Id), 33 shells. 



4. One shell (fig. le) has a peripheral band only. 



The above division is somewhat arbitrary, as the patterns 

 and colors blend in some specimens. 



In Kalaikoa a large series from Gulick contains no bright- 

 green shells. Olive-green, with pattern no. 1 (above), and 

 pattern no. 2 and no. 3 'predominate. There are a few dark 

 chestnut shells (pi. 27, fig. 3) . The shells are decidedly rough. 



Achatinella limbata Gul., from Ahonui and Kalaikoa is 

 identical with the typical green and yellow forms of byrotwi 

 shown in figs. 1 to Ic, having the same subsutural line, etc. 

 It is described as ' * striate, sometimes rugose, green or yellow ; 

 apex rose, frequently faded in mature specimens ; . . . peris>- 

 tome black." " It differs from A. melanostoma Newc., in 

 being more rugose, with rose-colored apex and subangulated 

 body- whorl." Gulick subsequently (P. Z. S., 1873, p. 91) 

 conceded the identity of limbata with byronii. 



4a. A. BYRONII RUGOSA Newcomb. PI. 29, figs. 22, 220 ; pi. 27, 

 figs. 8 to 10a. 



" Shell dextral, conical, glossy; whorls 6, rounded, mar- 

 gined above ; suture well impressed. Lip expanded, of a red- 

 dish-brown at the margin, thickened near the edge. Columella 

 white, short, twisted, and with a strong -callus spread over 

 the umbilicus. Aperture subrhomboidal. Striae longitudinal, 

 numerous, and on the last whorl rugose. Color of epidermis 

 of a deep green, a light or dark umber, sometimes alternating 

 and arranged with the striae, with or without pale green trans- 



