AMASTRA, OAHU. 231 



resembles it in form. Length 10, diam. 4 1 /-rtwentieths of an 

 inch. Lehui, Oahu (Newcomb, for A. acuta). 



Oahu: Lihue, in the Waianae Range. Type in Newoomb 

 coll., Cornell University. 



Achatinella elongata NEWCOMB, Annals of the Lyceum of 

 Nat. Hist, of New York, vi, May, 1853, p. 26; t. c., Sept., 

 1858, p. 328 (identity of A. acuta and A. elongata affirmed 

 and explained). --Amastra elongata SYKES, Fauna Hawaii- 

 ensis, p. 349. Not A. elongata BORCHERDING, Zoologica, xix, 

 p. 124, pi. 10, f. 24. Achatinella acuta NEWCOMB, P. Z. S., 

 1853, p. 142 (not of Swainson; not P. Z. S., pi. 23, fig. 36 = 

 A. soror] . PFR., Monographia, iv, 528. 



Newconib at first intended to name this shell A. acuta, but 

 that name being in use, it was changed to elongata in the 

 paper published in New York, which appeared before that in 

 P. Z. S. under the name acuta. Both descriptions were based 

 upon the same unique specimen, stated to be from Lihue, in 

 the Waianae range, Oahu. 



Borcherding follows Hartman in uniting A. hutchinsonii of 

 Maui as a synonym of elongata. He figures a specimen from 

 Waialua, near the eastern end of Molokai, which is clearly 

 villosa Sykes, a form of hutchinsonii. We do not endorse this 

 view. With a length of about 12 mm., A. elongata has 7 

 whorls. It is therefore only about 'half the size of A. hutchin- 

 sonii or villosa. The embryonic sculpture is unknown. 



Newcomb subsequently procured additional specimens 

 which he referred to elongata. Two of these, sent by him to 

 Garrett, and now in the Bishop Museum, are certainly the 

 Mauian A. Itrva Bald., one being quite typical, the other (pi. 

 49, fig. 10) is a wider form, 11x6 mm., having the shape of 

 interjecta, but the rough sculpture, solid texture and white 

 aperture of l&va. 



A. elongata has not been found 'by Oahuan conchologists of 

 the present generation. Competent judges among them doubt 

 the occurrence of such a shell on Oahu. 



