146 ACHATINELLA DECIPIENS. 



A. decipiens (including torrida and corrugata) represents 

 A, byronii on the northeastern side of the Main Range in the 

 valleys from Waikane to Kahana. As we do not know what 

 forms occur on top, and whether there is complete intergrada- 

 tion there, the races from the windward side are for the time 

 treated as a species distinct from byronii. It differs from 

 byronii by having the lip entirely or mainly white and by 

 having part of the patterns different. 



Newcomb 's typical lot consisted of shells resembling pi. 32, 

 figs. 2, 2&, from examples received from him; fig. 2a repre- 

 senting the pattern of his type figure. The shell is yellow, 

 profusely streaked and lineate with deeper yellow and chest- 

 nut along growth-lines, having a white zone below the suture 

 and typically another at the periphery; spire mainly white, 

 lip and aperture also white. Under a hand-lens the surface 

 is seen to be quite distinctly striate spirally, with a finer de- 

 scending wrinkling such as is usual in Partulina, but this 

 varies in distinctness -a good deal, among the specimens from 

 Newcomb himself, on some of which it would not be noticed if 

 not especially looked for. Length 18, diam, 10 mm. 



In other Kahana lots, collected by Gulick, the patterns vary 

 somewhat (pi. 32, figs. 3 to 5). Olive-green or yeliowish- 

 green may take the place of chestnut streaking. The surface, 

 typically almost smooth, may be rather distinctly corrugated 

 in some shells. These pass directly into the form called cor- 

 rugata Gulick. 



Length 23, diam. 11 mm. 



Length 17, diam. 10 mm. 



Length 16.3, diam. 9 mm. (rough, stunted shell) . 



In another Kahana lot the prevalent color is light yellowish- 

 green, faintly streaked, and fading to whitish near the suture 

 and on the spire (pi. 32, fig. 3&). Other shells are broadly 

 banded with chestnut, glossy like the preceding; lip tinted 

 (pi. 32, fig. 4a). Another pattern occurring sparsely in this 

 and other Kahana lots is dull yellowish, copiously streaked 

 with chestnut and blackish, and having two spiral brown- 

 bands. It is almost lusterless and somewhat corrugated. 



It is evident that Gulick did not collect in Newcomb 's type 

 colony of decipiens, which may have been of small extent. 



