6 Hawaiian Species of Helicina. 



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

 lar, not contracted; outer lip with a thin edge. Callus thin, 

 whitish about the axis, the rest transparent, minutely punctate. 

 Operculum corneous, thin, minutely punctate. 



Maj. diam. 4.4, total length 2.9 mm. 



Kauai : Ekaula, below Puukapele. 



Type No. 14,901, Bishop Museum. 



This variety somewhat approaches H. oahuensis. It is, how- 

 ever, quite closely related to H. laciniosa. This is the nearest 

 relative to laciniosa so far reported from the island of Kauai. 



var. gamma, n. var. 

 Fig- 3- 



The shell is bicouic, acutely carinate at the periphery, nearly 

 smooth, finely striate with lines of growth, without spiral lines, 

 but distinctly impressed just above and below the peripheral keel. 

 Color light cinnamon, nearly uniform, overlaid with a thin yel- 

 lowish cuticle. Spire depressed-conic, apex subacute. Suture 

 simple. Whorls 4, nearly flat, the embryonic nearly smooth, the 

 second and third slightly convex, the last flat above the carinate 

 periphery, convex below, descending slightly in front. Aperture 

 oblique, subtriaugular, not contracted ; outer lip with a thin edge. 

 Callus thick and whitish about the axis, the rest very thin and 

 transparent, minutely punctate. Maj. diam. 5.0, total length 

 3.5 mm. 



Oahu : Ewa (Cooke), Wahiawa (Lyman, Cooke). 



Type No. 14,902, Bishop Museum. 



This is one of the most distinct of the varietal forms of 

 laciniosa. The relatively high spire and pronounced carination 

 easily distinguish it from the other varieties. 



var. beta, n. var. 



Fig. 4. 



The shell is globose-conic, with the periphery rotundate-angu- 

 late, nearly smooth, faintly striate with lines of growth, encircled 

 at and immediately below the periphery with three raised, rounded 

 keels. Color a uniform dull claret, spire slightly eroded. Spire 

 conic, with slightly convex outlines, apex slightly obtuse. Suture 



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