THE NAUTILI'S. 113 



Striae, and under a lens exhibiting a fine pattern of decussating spiral 

 striae; nuclear whorls faintly decussated. Of a uniform bro ah color, 

 a narrow white line below the periphery, which enters the aperture, 

 and a very narrow white line traversing the suture. Whorls 6, 

 slightly marginate above, a little convex; suture lightly impressed. 

 Aperture oblique, oval, livid-white, showing the exterior coloring 

 within. Peristome acute, expanded, columellar column broadly 

 reflexed. Columella white, terminating in a well developed, flexu- 

 ous fold. 



Length, 25 ; diam., 14 mm. 



Habitat, Nahiku, East Maui. 



PartuUna kaaeana, n. sp. 



Shell sinistral, subperforated, solid, globose, with a conical spire, 

 apex subacute; surface rather lusterless, covered with rather coarse, 

 wavy growth-lines, and under a lens exhibiting close and delicate de- 

 cussating spiral lines; nuciear whorls faintly decussated. Color ashy- 

 brown, with a light brown band just below the periphery and enter- 

 ing the aperture; whole surface covered with minute longitudinal 

 white flecks or streaks; apex tessellated white and brown. Whorls 

 6, not margined above, flatly convex; suture Jightly impressed. 

 Aperture a little oblique, oval, livid-white, showing the outside color- 

 ing within. Peristome acute, slightly thickened within, expanded, 

 columellar margin reflexed, light brown on both face and the reverse. 

 Columella white, terminating in a strong, plaited, projecting tooth. 



Length, 21; diam., 13 mm. 



Habitat, Mt. Helu, 4000 ft. alt., West Maui. 



Animal extended in motion longer than the shell. Mantle brown- 

 ish-black, with outer edge bordered with a narrow white line. Foot 

 below and side light slate color. Head above and tentacles dark 

 slate and granulated. 



This shell was found on a mountain-peak quite isolated from the 

 main mountain mass of West Maui. We dedicate it to Mr. W. F. 

 Kaae, who seems to have been the only one in quest of shells who has 

 ventured to climb this lonely peak. He found the shell in company 

 with Perdicella oi-nata Nc. a species supposed long since to have be- 

 come extinct. 



( To be continued.) 



