jVeiV Species of Atnastra. 27 



contracted above, with a rather sharp point. Embryonic whorls 

 costate. carinated above the suture. The intermediate whorls 

 striate, the last half of the penultimate and the last whorl distinctly 

 malleate, with long narrow obliquely descending facets. The last 

 whorl is rather long, subcylindrical, tapering very gradually to 

 the base. Aperture subpyriform the outer margin slightly flat- 

 tened, lip-rib strong. Columella narrow, nearly straight, appressed 

 to the shell for nearly its whole length. Columellar fold strong, 

 oblique, tapering gradually and nearly reaching the margin of the 

 columella. The umbilicus when present is minute, cleft-like. 



Length 18.2, diam. 9.0, apert. 8.0 mm.; 6^ whls. (Holotype) 

 20.9, " 9.6, " 7.8 " -jYz " 

 " 18.5, " 8.6, " 7-5 " 6 



Molokai : Pleistocene of the shifting sands north of Mauna 

 Loa and directly south of Laina where the pipe line crosses the 

 shifting sands (type locality), Kalainawawae, Moomomi, Hinanau- 

 lua and Puukapele (Cook). 



Holotype and cotypes No. 41,992, paratypes No. 40,102, 

 Bishop Museum. 



A very few imperfect specimens were found by Pilsbry and 

 Cooke in 191 3 at Moomomi where this variety is extremely rare. 

 Further west, especially in the shifting sands, it occurs more abund- 

 antly but is not a common species in any locality. It has been 

 found sparingly in all the known fossil deposits from Puukapele 

 west to the shifting sands. This variety is readily separated from 

 the typical form by its less tumid last whorl, more cylindrical form 

 and malleate surface. The columellar fold is weaker and does net 

 terminate abruptly. A. ii. vetiiscula may on later examination 

 prove to be of specific rank. It differs from all the specimens of 

 A. uniplicata in the collection of the Bishop Museum but none of 

 these are as narrow as the figure of Hartman's specimen. 



{Assimilis Series.) 

 A. mirabilis, n. sp. 



PI. U. FiK- 9- 



The shell is imperforate, sinistral , ovately-conic, the outlines 

 of the spire nearly straight above, convex below. In its dead 



[245] 



