1900.] NATURAL SCIENCES OF PHILADELPHIA. 381 



NOTICES OF NEW JAPANESE LAND SNAILS. J , 

 BY H. A. PILSBRY. 



Certain species of Japanese laud mollusks, described by the 

 author in these Proceed ings for 1899, pp. 525-530, have been rede- 

 scribed by Mr. G. K. Gude in Proceedings of the Malacological 

 Society of London, IV, March, 1890, pp. 8-23, Mr. Gude having 

 been unaware of their previous definition. . The necessary cor- 

 rections of nomenclature will be made by Mr. Gude in an article 

 now about to be published. The diagnostic characters of a num- 

 ber of new Japanese land snails may be stated as follows : 



Key to Japanese Species of Alycceus. 



a. Operculum typical; thin, concave and nearly smooth outside. 

 b. Last whorl moderately contracted behind the aperture. 

 c. Broadly and perspectively umbilicated; last whorl 

 smooth near the aperture; whorls 3|. Alt. 2, 

 diam. 4J mm. Operculum thin, tawny brown. 

 Yokohama, under the bark of pine trees. 



A. japonicus Martens. 



c'. Umbilicus moderate and deep, its width contained 3f 

 times in that of shell; last whorl constricted into 

 a smooth neck, beyond which it is striate again; 

 no spiral striae on the early whorls; whorls 3. 

 Alt. 2.6, diam. 3.75, umbil. 1 mm. Operc. 

 thin, tawny yellow, showing the edges of the 

 whorls slightly. Kashima, Harima. 



A. harimensis n. sp. 



b'. Last whorl scarcely contracted, rib striate to the aperture, 

 c. Umbilicus moderate, its width contained 3 times in 

 that of the shell ; whorls 3, densely and almost 

 evenly rib-striate to the aperture, not spirally 

 striated. Alt. 1.7, diam. 3.2, width of umbilicus 

 .9 mm. Operc. thin, yellowish. Kashima, Har- 

 ima A. reinhardti n. sp. 



c'. Umbilicus open; whorls 4, the post-nepionic one spi- 

 rally striate. Alt. 2, diam. 4 mm." Yedo. 



A. nipponensis Reinh. 



