1895.] NATURAL SCIENCES OF PHILADELPHIA. 229 



almost white with a slate tinge. Foot above and below almost 

 white, the posterior portion and edges densely studded with very 

 minute pink spots. Tentacles short, light slate, with a few spots 

 of the same color on the head above. 



All the Amastra species are terrestrial in their habits ; their form 

 of dentition is given in the preface to this article. The formula for 

 this species is L's. 1.28 X 99=5,645. (Prof. Gwatkin.) 



Unlike most of the Amastra, which generally have dark dingy 

 colored animals, this species has a beautiful, almost white animal. 

 The after portion and edges of the foot under a lens are seen to be 

 closely studded with minute pink spots which give these parts 

 a delicate pink hue. 



Amastra umbrosa, n. sp. PL XT. figs. 36, :57. 



Shell dextral, imperforate, solid, globosely ovate-conic ; surface 

 lustreless, covered with close, rather regular growth stria? ; the 

 lower whorls spirally malleated ; the embryonic whorls finely radi- 

 ately sulcated. Color white, apex dark chestnut ; nearly the whole 

 surface covered with irregular streaks of a black, fugacious epider- 

 mis, worn off in front of the aperture. Whorls 6, slightly convex, 

 the last somewhat inflated. Aperture ovate, a little oblique, white 

 within ; peristome acute, thickened within, expanded ; columella 

 white, fiexuous, abruptly terminating in a somewhat thick lamellar 

 plait. 



Length, 21 ; diam. 12£ mm. 



Habitat, Kamalo, Island of Molokai. 



Animal extended in motion longer than the shell. Mantle dark 

 brown with a margin of lighter shade. Foot light brown, the 

 superior portion and sides studded with large spots of deeper shade. 

 Tentacles short, stout, very dark brown. 



The formula of dentition is 28.1.28. The marginals take a pecu- 

 liar form. (Prof. Gwatkin. ) 



Amastra rubicunda, n. sp. PL XI, fig. 38. 



Shell dextral, imperforate, rather solid, elongately ovate-conic ; 

 surface lustreless, striated with irregular growth striae ; embryonic 

 whorls smooth. Color reddish, with traces of a deciduous, thin, 

 brown epidermis. Whorls 7, slightly convex ; suture well im- 

 pressed. Aperture elongately oval, a trifle oblique, rather small, 

 purplish red within ; peristome simple, thin, margined with dark 



