1902.] NATURAL SCIENCES OF PHILADELPHIA. 119 



So far as we now know, its area of distribution does not overlap 

 that of the carinated form of V. japonicus. Mr. Iwakawa writes : 

 " This excellent species has hitherto been known only from Lake 

 Biwa, to which I will now add two more localities : Lake Suwa in 

 Prov. Shinano, and Nagoya in Prov. Owari, on the strength of 

 specimens contained in the Imperial Museum." " In tKe north- 

 eastern provinces of Hondo I could not obtain a single specimen of 

 this species, in spite of my efforts to collect during the excursion of 

 last summer. It is very desirable to ascertain its range of distribu- 

 tion in middle Japan and also in the southwestern provinces, where 

 it probably also occurs. ' ' 



Paludina sclateri of Kobelt's Fauna seems to be an ecarinate 

 form of this species. It is far from being typical sclateri. 



MELANIIDJE. 

 Melania reiniana var. hidachiensis nov. PI. IX, fig. 2. 



Shell moderately slender, greenish-yellow above, the last whorl 

 olive-brown under a blackish incrustation. Whorls strongly con- 

 vex, sculptured with strong, slightly curved ribs, rather wide-spaced, 

 11 or 12 on the penultimate whorl, those on the last whorl becoming 

 smaller and closer, not extending below the periphery ; the whole 

 surface sculptured with spiral lirse, about 15 on the last whorl, those 

 below the periphery continuous, those above more or less obsolete 

 between the longitudinal ribs, conspicuous upon them. 



Length 23, diam. 9, length of aperture 8J mm. ; 6 whorls 

 remaining. 



Length 20, diam. 9, length of aperture 9-J- mm. ; 4 whorls 

 remaining. 



Manabe, Prov. Hidachi (Mr. Y. Hirase). Types No. 80,680 

 Coll. A. N. S., from No. 145 of Mr. Hirase's collection. 



This form has quite convex whorls, while they are flat in M. 

 multigranosa. The ribs are strong, especially above, as in a strongly 

 marked Gonio basis plicifera, and the spirals of the base are numer- 

 ous and equal. M. multigranosa Bttg. is a species closely related 

 to M. niponica Smith, and like that, known only from the neigh- 

 borhood of Lake Biwa, while the present form is from Hidachi 

 province, on the east coast northward from Tokyo Bay. It is far 

 more strongly sculptured than M. reiniana, which is clearly only an 

 extreme form of M. libertina. The somewhat complex relationships 



