Hawaiian Species of Helicina . 7 



faintly impressed, simple, indistinctly margined above on the 

 third whorl. Whorls 4^, slightly convex, the embryonic slightly 

 eroded, the last rotundate-angulate, slightly descending in front. 

 Aperture oblique, nearly semicircular, not contracted ; outer lip 

 with a thin edge. Callus thick, minutely punctate. Operculum 

 dull claret, minutely punctate. Maj. diam. 4.5, total length 

 4.0 mm. 



Oahu : Kapalama (Lyman). 



Type No. 14,903, Bishop Museum. 



This variety differs not only in size and in its relative propor- 

 tions, but also in its dull claret color which has not been observed 

 in any of the other varieties of this species. 



var. alpha, n. var. 



Fig- 5- 



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

 lar, quite smooth, striate with lines of growth and encircled with 

 5-7 impressed spiral lines, the two most prominent being just above 

 and below the peripheral keel. Color a nearly uniform light cin- 

 namon red with a slight suffusion or spotting from incipient surface 

 decay, sometimes broken by very indistinct lighter flammules. 

 Spire straightly conic, apex rather acute. Suture scarcely im- 

 pressed, indistinctly margined. Whorls nearly 4, almost flat, the 

 embryonic very minutely transversely striate, the last nearly flat 

 above the strongly angular periphery, very convex below it, slight- 

 ly descending in front. Aperture oblique, subtriangular, not con- 

 tracted ; outer lip thin. Callus quite thick, whitish about the 

 axis, the rest nearly transparent, minutely punctate. Operculum 

 reddish corneous, thin, very minutely punctate. Maj. diam. 3.2, 

 total length 2.6 mm. 



Oahu: Mt. Tantalus (Cooke). 



Type No. 14,904, Bishop Museum. 



This variety comes nearer the true H. laciniosa in form and 

 sculpture than any of the other varieties of this species mentioned 

 herein. It differs in its higher spire and smaller size. It is inter- 

 mediate between H. laciniosa Migh. and H. sulculosa Ancey. 



" [203] 



