VI. 



Section PERDICEU/A Wm. H. Pease. 



Shells from Molokai. 



218. Achatinella helena Newcomb. 



A. helena Newc. P. Zool. Soc. London, 1853, p. 151, pi. xxiv, fig. 63. 



Shell ovate-conical; whorls 5, rounded; suture deep; aperture 

 ovate; columella slightly callous; striae finely decussated; color 

 rufous; alternating with broad, longitudinal, zigzag lines of white 

 covering the entire shell, with or without a white band encircling 

 the last whorl. L,ong. 10/20, lat. 5 1-2/20 poll. 



Within the coil of the Ki tree leaf, as it starts from the trunk. 

 — Newc. 



Hab. Kamalo to Kalae. — Bald. 



2. Shells from East Maui. 



MAUIENSIS GROUP. 

 219. Achatinella tnauiensis Newcomb. 



A. tnauiensis Newc. P. Zool. Soc. London, 1S55, p. 207. 



Shell subperforate, ovate-oblong, slender, longitudinally irreg- 

 ularly striate under the lens spirally and densely decussately stri- 

 ate, not shining, white, with broad, serrated longitudinal, brownish 

 streaks ; spire regularly conical, apex obtuse ; suture smooth, 

 scarcely submargined ; whorls 5 1-2, flattened, the last equal to 

 2-5 of the shell; base subatteuuated; aperture oblong, not oblique; 

 columellar plication obsolete; lip simple, straight, brown-margined; 

 columellar margin reflexly arched, partially adherent. Long. 5, 

 lat. 25 in. 



Remarks. This species might, with more propriety, be placed 

 under Bulimus, as the Genus Achatinella was originally defined 



(134) 



