1895.] NATURAL SCIENCES OF PHILADELPHIA. 283 



eata Pfr. from Oahu; species* possessing entirely different charac- 

 teristics. 



Common, but very local in its distribution, in a belt of forest land 

 about 4,000 feet above sea level. 



Amastra antiqua, n. sp. PI. XI, fig. 47. 



Shell fossil, dextral, narrowly but deeply perforated, the perfora- 

 tion penetrating almost to the apex; solid, elongately ovate, apex 

 subacute ; surface sculptured with rude, irregular lines of growth, 

 I he apical whorls smooth. Color of the Hying shell unknown. 

 Whorls 6, convex ; suture well impressed. Aperture a trifle oblique, 

 sublimate; peristome thickened within, columellar margin adnate, 

 slightly expanded over the umbilicus, extremities somewhat converg- 

 ing and united by a thick parietal callosity; columella rlexuous, 

 terminating in a narrow plait. 



Length, 20; diam. 12 mm. 



Habitat, Ewa, Island of Oahu. 



We received this- species from Prof. A. B. Lyons, of Oahu Col- 

 lege. He reports that he found at Ewa a singular accumulation of 

 these and other fossil land shells, huddled together in one spot in a 

 bed of soft tufa-like material, at an altitude not far above sea level. 

 The existence of living examples of this and the following species 

 now, or within any recent period, is highly improbable. 



Amasta vetusta, n. sp. Pi. XI. fig. 50. 



Shell fossil, dextral, imperforate, solid, ovately conical, apex rather 

 acute; surface sculptured with somewhat regular, close rib-strise in 

 the direction of the growth lines, with a few faint cross lines ; the 

 embryonic whorls radiately sulcated. Color of living shell unknown. 

 Whorls 6i, very slightly convex; suture lightly impressed. Aper- 

 ture siuuately oval, a little oblique ; peristome flatly blunt, thickened 

 on the inner edge, margins united with a thick callosity ; columella 

 flexuous, abruptly terminating in a small, thin plait. 



Length, 13; diam. 7 2 mm. 



Habitat, near Honolulu, Island of Oahu. 



This species was also discovered by Prof. Lyons. It occurs near 

 the base of Punchbowl Hill, at an altitude of twenty or thirty feet 

 above sea level, in a conglomerate of volcanic tufa and sand cemented 

 together with carbonate of lime. Prof. Lyons thinks the shells 

 must have lived near the spot where they are now found embedded 



