OP CONCHOLOGY. 217 



15. Achatinella Mauiensis, Newcomb. 

 Zool. Proc, London, 1855, page 207. 

 Plate 13, fig. 16. 



Description. — Shell sub-perforate, ovate-oblong, slender, lon- 

 gitudinally irregularly striate, under the lens spirally and 

 densely decussately striate, not shining, white, with broad, 

 serrated, longitudinal, brownish streaks ; spire regularly coni- 

 cal, apex obtuse; suture smooth, scarcely sub-margined; 

 whorls 5 J, flattened, the last equalling § of the shell; base 

 sub-attenuated ; aperture oblong, not oblique ; columellar pli- 

 cation obsolete ; lip simple, straight, brown margined ; colum- 

 ellar margin reflexly arched, partially adherent. 



Long. '5, lat. *25 in. 



Habitat. — West Maui. 



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

 placed under Bulimvs, as the genus Achatinella was originally 

 defined by Swainson. This has, however, been enlarged by 

 Dr. Pfeiffer to include the numerous late additions of aberrant 

 forms with which Swainson was not acquainted. 



It is with regret I learn that many localities of the rare and 

 beautiful forms of this genus have been destroyed on the 

 islands. Many of the species that selected for their homes the 

 broad green Ti leaf have had their habitations destroyed by 

 the greatly extended grazing ground of large herds of cattle. 

 Mr. H. Mann, who recently returned from researches on the 

 islands, states that Achatinella 's have become very scarce owing 

 to the above-named cause. 



