518 PROCEEDINGS OF THE ACADEMY OF [August, 



Miyai, Kii. Types No. 83,389, A. N. S. P., from No. 954 of 

 Mr. Hirase's collection. 



Very distinct by its thick, club-like shape, peculiar aperture, the 

 curved branch of the inferior lamella, and the palatal structure. 

 It has the pale color and fine sculpture of other members of the 

 group. 

 Clausilia kurozuensis n. sp. PI. XXVII, figs. 1, 2, 3, 4. 



Shell fusiform, moderately tapering to an unusually thick apex, 

 very thin; white or grayish -white, the specimens being wholly 

 denuded of cuticle; for the same reason, only faint traces of fine 

 striation are discernible on the worn surface. Whorls about 9, but 

 slightly convex, the last tapering, somewhat compressed. Aperture 

 somewhat oblique, piriform, with a well-defined sinulus. Peri- 

 stome white, continuous, reflexed and much thickened. Superior 

 lamella short, oblique, marginal, continuous with the spiral lamella, 

 which penetrates to the middle of the ventral side. Inferior 

 lamella receding, visible as a strong fold in an oblique view, giving 

 off a branch toward the superior lamella; within it is a high, 

 obliquely ascending plate, thickened below, penetrating inward 

 decidedly deeper than the spiral lamella. Subcolumellar lamella 

 emerging, bounded by grooves, but hardly extending to the lip- 

 edge. Principal plica visible in the throat, extending inward to a 

 lateral position, being about one-third of a whorl long. Palatal 

 plicse four, nearly equal, the upper one less oblique (fig. 4), or 

 the lower two may be quite small and nodule-like (fig. 2). 



Length 20, diam. 4.7 mm. 



Length 17.6, diam. 4.2 mm. 



Clausilium (PL XXVII, fig. 3) narrow and parallel-sided, 

 evenly tapering on both sides to the apex, tapering at the filament, 

 but not excised there. 



Kurozu, Kii. Types No. 83,390, A. N. S. P., from No. 934 of 

 Mr. Hirase's collection. 



By the palatal armature of some specimens this might be placed 

 in the group of C. validiuscula ; the armature of others comes 

 nearer that of C. sublunellata. The pale color and apparently 

 fine striation cause me to place the species in the latter group. The 

 specimens, though they have lost the original surface by erosion, 

 were collected alive. Probably some other locality or station will 

 supply unworn shells, and the color will be found to be pale yellow- 



