1905.] 



NATURAL SCIENCES OF PHILADELPHIA. 



751 



convex and parted by well impressed sutures, smooth except for faint 

 growth-lines. The last whorl has a rounded and rather strong crest 

 or varix behind the outer lip. The aperture is ovate, brown within; 

 peristome brown-edged, the columella concave and somewhat thickened, 

 whitish. Length 7, diam. 3.25 mm., 'length of aperture with peristome 

 2.8 mm. 



Rons. Tyi3es No. 90,726 A. X. S. P., from No. 1,453 of Mr. Hirase's 

 collection. 



This species is related to B. japonica (A. Ad.) of Sado Island, but 

 is smaller and especially narrower, with a much lower varix behind the 

 outer lip. The apex is perfect. 



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