136 THE NAUTILUS. 



suture well impressed. Aperture oblique, oval, white within. Per- 

 istome acute, slightly thickened within, columellar margin narrowly 

 reflexed. Columella terminating in a strong, white, flexuous fold. 



Length, 18^ ; diam. 10^ mm. 



Habitat, Kipahulu valley, Hana, East Maui. 



The sinistral variety may prove to be a distinct species. 



The molluscan life of this rather secluded valley has only recently 

 been explored. 



Newcombia carinella, n. sp. 



Shell dextral, very minutely perforated, solid, acuminately turrited , 

 apex subacute ; surface lusterless, rather coarsely and irregularly 

 wrinkled by growth stria?, and covered with numerous rather prom- 

 inent decussating spiral striae which extend to the apex, with a cord- 

 like carination at the periphery. Color white and brown, alternating 

 in irregular longitudinal undulations, upper whorls with regular 

 white and brown tessellations ; apex light brown. Whorls 6, slightly 

 convex ; suture lightly impressed ; the suture of second and third 

 whorls are margined by the continuation of the peripheral keel or cord. 

 Aperture oblique, oval, livid-white or light-brown within. Peris- 

 tome light-brown, acute, very lightly thickened within, columellar 

 margin reflexed over the small perforation. Columella very slightly 

 developed, plain and smooth. 



Length, 15 ; diam., 6^ mm. 



Habitat, Nahiku, East Maui. 







Amastra montana, n. sp. 



Shell dextral, imperforate, rather thin, ovately conical, apex acute ; 

 surface lustreless, sculptured with fine incremental lines ; the nuclear 

 whorls finely radiately sulcated. Color light-brown, covered with a 

 dark fugacious epidermis. Whorls G, the upper ones slightly convex, 

 the last one somewhat inflated, forming the larger part of the shell. 

 Aperture a little oblique, elongately oval, white within. Peristome 

 simple and thin. Columella terminating in a thin, arched, lamellar 

 plait. 



Lenth, 14; diam., 9^ mm. 



Habitat, Mt. Kukui, summit of West Maui, 6,000 ft. alt. 



Animal in motion as long as the shell. Mantle dark-brown with 

 alight-brown border. Foot and tentacles almost black. Head above 



O 



coarsely granulated. 



