Hawaiian Species of Helicina. ii 



rest below, the slightly angular periphery. Color of a uniform 

 greenish yellow or cinnamon brown. Spire conoidal, apex obtuse. 

 Suture simple, well impressed. Whorls 3^, flatly convex, slowly 

 and regularly increasing, the last flattened and sloping above the 

 slightly angular periphery and very convex below it, gradually 

 descending in front. Aperture oblique, semicircular, not con- 

 tracted ; outer lip thin. Callus thick and white near the axis, the 

 rest very thin, of the same color as the shell, minutely punctate. 

 Operculum very thin, of the same color as the shell and minutely 

 punctate. Maj. diam. 2.9, total length 2.5 mm. 



Oahu : Nuuanu, upper part (Cooke). 



Type No. 14,908, Bishop Museum. 



Nuuajuicnsis is easily distingijished from the other Hawaiian 

 species. In size it approaches H. rotelloidea Migh., but differs b\' 

 its higher spire, less convex whorls, the last of which is flattened 

 above the inconspicuous peripheral angle. It is apparently most 

 nearly related to H. laciniosa Migh. 



Helicina berniceia, n. sp. 



Fig. II. 



The shell is globosely depressed, with a rounded periphery, 

 quite thin, smooth, minutely marked with growth -striae. The 

 spire is rather high, with convex outlines and a slightly conoidal 

 summit. Suture simple, slightly impressed. Whorls 4, very 

 slightly convex, regularly increasing, the last rounded, slightly 

 flattened below, hardly descending in front. Aperture oblique, 

 semicircular, not contracted ; outer lip thin. Callus thin, smooth. 

 Operculum wanting. Maj. diam. 3.5, total length 3.1 mm. 



Kauai: Limahuli, fossil (Judd, Cooke). 



Type No. 14,909, Bishop Museum. 



This species is somewhat related to //. laciniosa Migh., though 

 it lacks the spiral lines and the angular periphery. Its nearest 

 relative appears to be H. nuuanucnsis, from Oahu. From this 

 species it differs slightly in size, in the convexity of the spire and 

 whorls, and the lack of spiral lines. At present this species is 

 only known in its fossil state. 



This species is dedicated to Bernice Pauahi Bishop, in whose 

 memory the Museum, which bears her name, was founded. 



[207] 



