ACHATINELLA LILA. 139 



It lives in a clump of lehua trees alongside of the trail, 

 about 1000 yards down the ridge from the locality of 

 A. turgida cookei. The colony is a very small one. 



In Mr. Wilder 's collection there are some nigricans from 

 the type colony distinctly banded with green on the last whorl. 



Mr. Spalding also found three specimens on a large moki- 

 hana bush on a lateral spur of the ridge 'about 100 yards 

 mauka from the locality of A. t. cookei. One of -these speci- 

 mens, fig. 10, is larger than those from the lower station. The 

 upper post-embryonic whorl is green, banded with brown. 



It is a rare and handsome shell, possibly deserving specific 

 rank. There is a black form of A. turgida which has an as- 

 tonishing resemblance to nigricans, but differs by being 

 smoother with the real turgida apex, that of nigricans being 

 quite different, 



So far as known, this subspecies is restricted to very few 

 small tree, in two spots less than a mile apart. 



5. A. LILA Pilsbry, n. sp. PL 31, figs. 15 to 15 d. 



The shell is sinistral, ovate-conic, thin but strong, nearly 

 smooth, brilliantly glossy. The embryonic whorls are burnt 

 sienna brown (weathering to whitish in adult shells) or some- 

 times there is a light median zone. Last whorl either (fig. 

 15cZ) uniform blackish chestnut, or (fig. 15) having a chest- 

 nut peripheral band and baso-columellar patch on a yellow 

 ground, or (figs. 15a, 6) like the last but with a green band 

 midway between periphery and suture, or (fig. 15c) with 

 sutural and peripheral bands and baso-columellar patch of 

 yellow on a chestnut ground. There are also a few speci- 

 mens more or less intermediate between the patterns of figs. 

 15 a, 5, d. The aperture is moderately oblique, white or 

 faintly lilac within ; peristome acute, very little or not per- 

 ceptibly thickened within; columellar fold strong, purple or 

 white. 



Length 17, diam. 11, aperture 9 mm. ; 5% whorls. 



Length 16.8, diam. 10.2, aperture 8.8 mm. 



Length 16, diam. 15.3 mm. 



Oahu : crest of the Waimano-Manana ridge at junction with 



