1904.] NATURAL SCIENCES OF PHILADELPHIA. 637 



periphery and beneath. Aperture rounded-lunate, the lip simple and 

 acute. 



Alt. .5, diam. 1 mm. 



Nishigo, Uzen. Types No. 87,933, A. N. S. P., from No. 1,266 of 

 Mr. Hirase's collection. 



This species is the size of P. japonicum or somewhat smaller, but 

 differs from that by its fine sculpture, without wide-spaced riblets. 



Punctum rota n. sp. 



Shell moderately umbilicate, pale greenish-corneous or olive-brown, 

 shining, sculptured with delicate, wide-spaced oblique riblets, the in- 

 tervals finely striate. Spire low-conic. Whorls 3, convex, the last 

 rounded peripherally and beneath. Aperture quite oblique, rounded, 

 nearly one-third of the circle excised by the penultimate whorl. Peris- 

 tome thin, the columellar margin dilated at the insertion. 



Alt. 1, diam. 1.7 mm. 



Nishigo, Uzen. Types No. 87,930, A. N. S. P. v from No. 1,191 of 

 Mr. Hirase's collection. Also occurs at Kyoto, Yamashiro, No. 1,221 

 of Mr. Hirase's collection. 



This form is more elevated and more rounded peripherally than P. 

 pretiosum Gude. The umbilicus is larger than in P. morseanum. Very 

 similar specimens, but of perceptibly darker brown color, were collected 

 on Okinoerabushima, Osumi. Although so distant from the type 

 locality, I can find no other distinctive characters. 



ACHATINID^E. 

 Opeas brevispira n. sp. 



Shell openly perforate, oblong, very short for the genus, corneous, 

 translucent, glossy, finely wrinkle-striate, the striae arcuate. Spire 

 short, regularly tapering to the obtuse apex. Whorls 5J, moderately 

 convex. Aperture long, rhombic-ovate, the outer lip arched forward 

 in the middle, columellar lip reflexed, not adnate except at the insertion, 

 columella straight. 



Length 6, diam. 3, length of aperture 2.6 mm. 



Kashima, Harima (Mr. Y. Hirase). Types No. 79,097, Coll. A. N. 

 S. P. 



Similar to 0. kyotoensis in the obtuse apex, open perforation and stri- 

 ation, but differing in being very much shorter and broader. The short 

 contour is quite unusual in this genus. 



Opeas kyotoensis n. sp. 



Shell almost imperforate,turreted, translucent, waxen whitish, glossy, 

 arcuately, inconspicuously wrinkle-striate, smoother below. General 



