THE NAUTILUS. 45 



NEW LAND MOLLUSKS OF THE JAPANESE EMPIRE. 



BY HENRY A. PILSBRY. 



Enlota {Aegista) minima n. sp. 



Shell openly umbilicate, depressed, convex above and below, 

 broadly rounded at the periphery, light yellowish-brown. Surface 

 densely covered with fine, short cuticular scales, readily rubbed off. 

 Whorls about 5, convex, separated by an impressed suture, slowly 

 increasing, the last wider, convex beneath, not noticeably descending 

 in front. Aperture broadly crescentic, oblique ; peristome slightly 

 thickened, very narrowly expanded and subreflexed. Alt. 3, diam. 

 6.3 mm. 



Oshima, Osumi. Types no. 83,369 A. N. S. P. from no. 929 of 

 Mr. Hirase's collection. 



Much smaller than any other Japanese species of the group, but a 

 true Aegista in form and sculpture. 



Enlota (Plectotropis} hachijoensis n. sp. 



Shell narrowly umbilicate, biconvex, acutely carinate, pale brown 

 or whitish corneous. Surface glossy, finely and faintly striate, and 

 under a lens seem to be very closely and distinctly engraved with 

 spiral strice beneath, more obsolelely so above. Whorls 4^ r 

 moderately convex, the last descending below the keel in frontr 

 slightly concave above and below the peripheral keel. Aperture 

 oblique, irregularly oval ; peristome slightly expanded above, re- 

 flexed below, scarcely thickened, the ends somewhat approaching. 

 Alt. 5.4, diam. 10 mm. 



Hachijo-jima, Izu. Types no. 83,368 A. N. S. P., from no. 943 

 of Mr. Hirase's collection. 



The pale color of the somewhat translucent, acutely carinate 

 shell, and its beautiful sculpture of spiral striae beneath are the more 

 prominent features of this species. It has the shape, but not the 

 surface, of Plectotropis, and does not seem closely related to any of 

 the known species from the adjacent islands of Japan, but resembles 

 closely the Riukiu species E. inornata Pils., differing chiefly in the 

 smaller number of whorls. 



Enlota {Aegista) aperta var. mikuriyensis nov. 



Similar to var. trachyderma Pils. & Gude, but more elevated and 

 covered with very much coarser, less crowded, ragged cuticular 



