530 PROCEEDINGS OF THE ACADEMY OF [August, 



able, except for the absence of dark pigment in the shell wall at its 

 position. 



Length 19, diam. 4-4.3 mm. 



Length 18, diam. 4.3 mm. 



Length 16.3, diam. 4 mm. 



Clausilium (PI. XXVIII, figs. 22, 23) rather wide below, 

 strongly curved, the apex somewhat acuminate, a little thickened; 

 dilated on the palatal side ; deeply excised on the columellar side 

 of the filament. 



Nippon or Hondo Island : Toyonishikami, Nagato, type locality. 

 Shikoku Island: Kashiwashima, Tosa. Kyushu Island: Yatsu. 

 shiro, prov. Higo, and Sasebo, Hizen (Y. Hirase). 



This widely distributed form apparently differs from C. sieboldi 

 as defined by Pfeiffer and Kobelt by its dark color, well developed 

 principal plica, two distinct palatal plicae, and the very low lunella. 

 It differs from C. neniopsis by the less approaching superior and 

 inferior lamellae, the former widely separated from the spiral 

 lamella, the very deeply immersed subcolumellar lamella, and 

 other characters. 



The specimens figured (No. 79,137, A. N. S. P.) are from the 

 type locality in Nagato province, southwestern Nippon. Those 

 sent by Mr. Hirase from Kashiwashima, Tosa, and Sasebo, Hizen, 

 are similar. Specimens from Yatsushiro, Higo, are quite thin, 

 somewhat smaller, with 9 whorls and the spiral lamella approaches 

 near the superior lamella. Length 15-16J, diam. 4 mm. 



Clausilia neniopsis n. sp. PI. XXVIII, figs. 24, 25, 26, 27. 



Shell fusiform, the penultimate whorl widest, the spire much 

 attenuated above, the apex minute, first two whorls of about the 

 same diameter, weakly convex, following whorls convex and 

 rather rapidly increasing, the last two whorls forming more than 

 half the total length, last whorl compressed laterally. The last 

 two whorls are blackish purple-brown or dull red, spire reddish, the 

 earlier two whorls nearly white. Surface somewhat glossy, sharply 

 and closely rib-striate. Aperture ovate-piriform, dark within. 

 Peristome continuous and free, rather broadly reflexed, somewhat 

 thickened, white on both face and reverse. Superior lamella mar- 

 ginal, vertical, thin, continuous with the spiral lamella which 

 penetrates past the ventral side. Inferior lamella prominent. 



