HAWAIIAN NESOPUPAE. 287 



5. NESOPUPA BALDWINI Ancey. PI. 27, figs. 9, 10. 



"Shell shortly cylindrical-oblong, openly yet minutely per- 

 forate, brownish red, with a silky sheen, almost destitute of 

 sculpture except for very thin lines of growth hardly visible 

 under a strong lens. Spire obtuse. Whorls 5y z , convex, the 

 first three increasing rapidly in diameter, the rest nearly equal, 

 with an impressed suture. The last oblong, scarcely swollen, 

 slightly attenuate at the base, contracted back of the aperture 

 by two shallow sulci parallel to the suture ; slightly ascending 

 in front. Aperture vertical, outwardly dilated angulate above 

 the middle, truncate ovate, armed with plicae or lamellae as 

 follows : parietals 2, of which one, the angular, is elongate, but 

 shorter than the next; the other, nearly median, more deeply 

 seated, long ; one columellar, acute, dentiform ; and two elon- 

 gate palatals, corresponding to the exterior sulci, parallel, of 

 which the upper almost reaches the margin. Peristome nar- 

 row, unicolorous, brown, slightly thickened, except at the colu- 

 mella, slightly expanded, with quite distant margins, the ex- 

 terior of which is slightly sinuous above. Length 1.5, diam. 

 0.8, alt. of apert. about 0.5 mm. Molokai (Baldwin) ; Kaupa- 

 kulua, Maui (Baldwin.) (Ancey.) 



E. Maui; Kaupakalua (Baldwin), Kailua (Cooke), Mahiku 

 (Forbes). W. Maui: Hahakea, Waihee (Cooke), Honokahau 

 (Forbes). Molokai: abundant on the wooded eastern part 

 (Thaanum, Forbes, Pilsbry, Cooke). Lanai : "top of Moun- 

 tain" (Forbes). Hawaii: Keehia (Thaanum), Laaloa 

 (Gouveia). Holotype 18698 Bishop Museum. 



Nesopupa Baldivini ANCEY, Proc. Malac. Soc. London, vi, 

 1904, p. 122, pi. 7, fig. 13, with var. centralis Ancey. 



This species and N. plicifera, are certainly very closely re- 

 lated. In baldwini the shell is darker colored, with slightly 

 more convex outlines, the surface is smoother, the costulse 

 much weaker, closer and finer; the lip insertions are more re- 

 mote, the angular lamella not being united with the outer lip 

 by a thick callus. The columellar lamella is transverse to 

 the columella, ending within in a rather prominent knob. 



In the typical form from Kaupakalua, Maui, the rib sculp- 



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