1903.] NATURAL SCIENCES OF PHILADELPHIA. 319 



than their intervals, becoming finer and then disappearing on the early 

 whorls; the intervals between the ribs more or less crinkled. Whorls 

 11, moderately convex, the last half of the last whorl flattened and 

 compressed, rounded beneath. Suture marked with a fine white 

 line. Aperture nearly vertical, dark inside, the peristome white, 

 narrowly reflexed. Superior lamella small and low, narrow, not con- 

 tinuous with the spiral lamella, barely reaching the margin or not 

 reaching it. Spiral lamella short, not quite reaching the middle of the 

 ventral side. Inferior lamella forming a strong fold in the aperture, 

 becoming subhorizontal, strongly spiral within, a little longer than the 

 spiral lamella. Subcolumellar lamella barely emerging or immersed. 

 Principal plica quite short, latero-dorsal. Upper palatal plica lateral, 

 short. Lower palatal plica shorter, oblique. No lunella. 



Length 28.7, diam. 7.7-8 mm. 



Clausilium wide, thickened and somewhat angular at the apex, 

 somewhat excised on the columellar side of the filament. 



Myokozan, Echigo. Types No. 84,444, A. N. S. P., from No. 986 

 of Mr. Hirase's collection. 



Belonging to the C. japonica group, this species seems well distin- 

 guished by its robust shape and very strong sculpture. It will be 

 figured with the other species of the japonica group of Stcrcophadusa^j 

 in a revision of them now in preparation. 



Clausilia japonica var. perstriata nov. 



Similar to japonica except in sculpture, the surface being strongly, 

 deeply and closely rib-striate. 



Kumanogongen, Echigo. Types No. 84,376, A. N. S. P., from No. 

 986a of Mr. Hirase's collection. 



Explanation of Plate XIV. 



Figs. 1, 2, 3, 4. — Clausilia sus n. sp. Typical form. 



Fig. 5. — Clausilia sus, a more attenuate variation occurring with the preceding. 



Figs. 6-10. — Clausilia sadoensis, n. sp. 



Figs. 11-14. — Clausilia cenea n. sp. 



Figs. 15-18. — Clausilia aratorum n. sp. 



