402 PROCEEDINGS OF THE ACADEMY OF [July, 



ANATINID^. 

 Anatina impura I'ils- Pi- XIX, tig. 0. 



rage 208. Types are Nos. 68,536 and 70,812 Coll. A. N. S. P. 



LIMIDiE. 



Lima Mans var. hirasei Pils. PI. XIX, fig. 12. 



Page 209. Types No. 80,525 Coll. A. N. S. P., from No. 

 901 of Mr. Hirase's collection. 



Closely allied to L. Mans Gm. of Europe, but the sculpture is 

 finer, the gape of both ends less widely open, and the anterior rib 

 inside is not so strong. 



ARCID^. 

 Area nipponensis Pils. PI. XIX, fig. 2. 



See p. 209. Types are No. 79,009 Coll. A. N. S. P. 



Land and Fresh-^vater Species. 



Buliminus reinianus var. hokkaidonis nov. 



Similar to reinianus except in being shorter and broader, with 

 very obtuse apex, the upper part of the spire broader. Whorls 8. 

 Length 23, diam. above aperture 8, longest axis of aperture 9 mm. 



Kayabe and Shukunobe, prov. Ojima, Hokkaido. 



Typical B. reinianus is not known from Hokkaido Island. I 

 now believe that it will be difficult, if indeed practicable or desirable, 

 to distinguish extorris or omiensis as races distinct from the variable 

 reinianus, though typically the forms are separable. There is also 

 a rather small and more striate form of the species occurring at 

 Okinoshima and some other places in Shikoku Island, but I have 

 not seen enough specimens to be satisfied that it requires varietal 

 distinction. 



HELICID^. 



Mandarina mandarina var. ponderosa nov. 



Shell large and very heavy, reddish-brown or purple-black with 

 a light umbilical patch; whorls 5^, the last one distinctly carinated 

 at the periphery. Surface coarsely decussate, the impressed spiral 

 lines being much stronger than in the typical form. Alt. 21, 

 diam. 28 ram.; alt. 19, diam. 26 mm. 



