I 



I 



A^ew Species of Amastra. 25 



small, narrow, deeply curved below the columellar fold, its outer 

 margin regularly curved and furnished with a strong thick lip-rib. 

 Columella short and broad. Columellar fold not especially strong, 

 rather oblique and terminating gradually just within the margin 

 of the columella. 



lycngth 14.3, diam. 6.9, apert. 6.1 mm.; 6 whls. (Holotype) 

 " 13-5. " 6.4, " 5.6 " 6 " 



Oahu : Pleistocene of Makua in the Waianae mountains 

 (C. N. Forbes). 



Holotype and cotype No. 41.9S0, Bishop Museum. 



The material on which this species is based consists of two 

 whole adult specimens and the lower portion of two additional 

 specimens. All the specimens were taken by Mr. Forbes in a single 

 pocket in sand deposits along the railroad track north of Makua. 

 On a later visit by Mr. Forbes and the author, no additional speci- 

 mens were found though all the exposed surfaces of the sand 

 pockets along the track were carefully gone over. These pockets 

 consist of beach sand covered by talus. Specimens of Endodonta, 

 Lyropupa, Siiccijiea, Leptachatiyia and Helicina are very abundant 

 in these pockets, especially of the two last genera. 



A.forbesi is easily distinguished from A. thaa}m}n i Q.nd uionta- 

 guei by its more extended embr3'onic whorls, narrower outlines, 

 etc. It is separated from A. elongata Newc. b}' its blunter apex 

 and greater length with less number of whorls. From the charact- 

 ers of the shells in Newcomb's description and the fact that he 

 distributed Mauian shells under the name of .-7. acuta (= elongata) 

 we are safe in doubting that Newcomb's species ever came from 

 Oahu. 



Section Amastra, s. s. 

 ( Mag n a Series . ) 



A. hitchcocki, n. sp. 



PI. C. Fig. 7. 



The shell is imperforate, conic-ovate, large, in its fossil state 

 white. The spire is conic in outline above with slightly convex 

 outlines below. The embryonic whorls conic, very finely striate, 

 outlines of the five earlier whorls nearly straight, the two lower 

 convex. The last whorl is rounded tapering towards the base, 

 with very coarse irregular growth-striae, especially near the aper- 



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