1904.] NATURAL SCIENCES OF PHILADELPHIA. 621 



lip pale yellowish Very delicately and evenly striate throughout. 

 Whorls 6J, convex, the last whorl very obtusely angular at the base, 

 very much swollen on the ventral face to the left of the parietal callous. 

 It is distinctly constricted in front, at or shortly in front of the inser- 

 tion of the outer lip. The aperture is very irregular in shape, the 

 peristome strongly thickened outside, bevelled and obtuse, the back 

 of the lip-thickening being white. Columellar margin straightened, 

 vertical, the columella bearing a strong tooth. Parietal callous ex- 

 tending in a rather narrow lobe nearly to the suture. Palatal plica 

 long, in large part overlaid by the parietal callous. 



Alt. 3, diam. 1.6 mm. 



Nomimura, Tosa. Types No. 87,643, A. N. S. P., from No. 1,027 of 

 Mr. Hirase's collection. 



This species is readily distinguished y the conspicuous swelling of 

 the last whorl in front of the aperture. The tapering portion of the 

 spire is longer than in most allied species. 



Diplommatina goniobasis n. sp. 



Shell cylindric below, tapering and conic above, dull red. Surface 

 finely and evenly striate. Whorls 6J, convex, the last ascending in 

 front, becoming biangular on its last half, the angles obtuse, one near 

 the suture, the other bounding the flattened basal area, the surface 

 between the angles being flattened. The constriction is at the termi- 

 nation of the outer lip. The aperture is very irregular in shape, the 

 lip heavily thickened with a wide but rather thin external rib. Colu- 

 mella vertical, short, with a very strong horizontal lamella. The pala- 

 tal plica is short and wholly covered by the parietal callous, which 

 extends nearly to the suture. 



Alt. 2.7, diam. 1.4 mm. 



Irazuyama, Tosa. Types No. 87,646, A. N. S. P., from No. 1,178 

 of Mr. Hirase's collection. Also a variety from Onomura, Tosa (l,027a). 



This species is very distinct by its irregular aperture, strong colu- 

 mellar lamella and peristome, and the biangular last whorl. It is 

 related to D. gibbera. 

 D. g. onoensis n. subsp. 



The specimens from Onomura, Tosa, are dirty yellowish in color, 

 with the two angles of the last whorl less strong and the constriction a 

 little more receding, so that it falls behind the insertion of the outer 



UP. 



Diplommatina kyushuensis n. sp. 



Shell obesely fusiform, the penultimate whorl largest, those above 

 tapering regularly, the last whorl also smaller. Pale yellowish-brown, 



