(5g Art. 1. — M. Vokoyama : 



Genus PKI EXE, H. et A. Adams. 

 S2. Pà'iene oi'ef/oiteiisis, (Redfield). 



Fiieiie oreijoneHnU. Pilsbry, Cata]., p. 47. A. Adams in Proc. Zool. Soc. Lond.,. 18G4, 



vol. YII, i\ lOG. 

 Triton oreijünemis. Eedficld, Ann. Lyc. Nat. Hist. New York, 1846, vol. IV, p. 165, 



pl. XI, fig. '2 ab. Küster in Syst. Concb.Cab. Mart. w. Cbem., p. 247, pb 66, fig. 2. 

 Tiitoitiiini iiie(i<me)tse. Martins, Mal. Blatt., XIX, 1872, p. 30. 

 Tritvniinn cnnccIlatiDii. Scbrenck, Moll. Annul, p. 431. 

 Tritim {Piieue) orerpuemin. Yokoyaina, Foss. Miura Penin., p. 64, pl. III. figs. 19, 20. 



Only some fragments. 



Fossil occurrence. — Sliito. Lower Musashiiio of Kamakura, 

 Yokosuka and Koshiba. 



Living. — Nortliern Japan. Alaska, Oregon, Chile, Sti'ait of 

 Magellan. 



Family Cassidldae. 



(Tenus CASSIS, Lamarck. 



VS. Chassis sfrif/afft, (Gmelin). 



PI. III. Fig. 9. 



Cassis stiiijata. Dunker, Ind. Moll., p. 65. Pilsbry, Cat., p. 48. Tryon, Man. Concb., 



YII, p. 276, pl. 7, fig. 85. Eeeve, Concb, Icon., Y, fig. 26. 

 Ciissi.s imdata. Küster in Mart. ii. Cbem. Syst. Concb. Cab., Ill, part 1, p. c9, pl. 52,, 



figs. 1,2. 

 Jhœcimtvi stii<iatiivi. Gmelin, Linne, Syst. Nat. ed. 13, p. 3477. 

 Cassis zebra. Lamarck, Anim. sans Yert.l X. p. 28. 



Of the four examples obtained, two are entii'oly devoid of 

 varices. The spii'al grooves of the bedy-whorl in one of the speci- 

 mens are only distinct on the lower two-thirds of the surface. The- 

 largest specimen measures G5 millim. in height, while the figured, 

 one is not quite GO millim. high. 



Fossil occurrence. — Otake, Tega. 



Living. — Central and Western Japan. 



