62 THE NAUTILUS. 



Length 10, diam. 5, aperture 4 mm. G 1 /^ whorls. 



Length 9.5, diam. 4. 9 mm. 



Length 9.3, diam. 5 mm. 



Length 9.2, diam. 4.4 mm. 



Oahu: Kawaihapai, on a steep wooded bluff about 500 ft. 

 above the coastal plain, and perhaps % mile from the sea. 

 Type no. 110593 A. N. S. P. Paratype in Bishop Mus. 



This is a much larger, more robust species than other forms 

 having a parietal callus and posterior commissure. The 

 columellar lamella is broader and less oblique. By its form 

 and texture it recalls L. resinula, which differs in apertural 

 characters. 



Kawaihapai is near the western cape of Oahu, and the bluff 

 there is the last terrace of the Waianae mountains. My com- 

 panions there were Dr. Cooke and Mr. Forbes of the Bishop 

 Museum. 



NOTES ON WEST AMERICAN EMARGINULINAE. 



BY WM. H. BALL. 



The large SubemarginulayatesiiDall, 1902, from Monterey Bay, 

 seems to be represented by a fragment from the Bay of Panama. 

 S. bella Gabb, described in 1865 is apparently very rare. I 

 have an uneasy feeling that it may prove to be the young of ya- 

 tesii; at all events the point will bear investigation; the speci- 

 mens at my disposal are insufficient to decide the question. 

 Zeidora flabellum Dall, 1895, is only known by the type speci- 

 men from deep water off Clarion Island. Rimula mazatlanica 

 Carpenter, 1857, is likewise represented only by its type. 



Puncturella (Cranopsis') expansa Dall, 1896, we have from 

 Panama Bay and the Galapagos Islands in deep water. 



The typical Puncturellas have the internal septum, below the 

 slit, buttressed by props. P. noachina of British seas is the 

 type. But a large number of the species are destitute of this 

 feature. The northern species have thickish tentacles, with the 



