FOSSILS FKOM THE EiN VIRONS OF TOKYO. 63 



ficant differences, a still more important distinction is that L. 

 aurita Br. has a nearly smooth surface. 



Shinagawa (very abundant). 



Living in Jajtan. 



IVIYTILID/E. 

 153. MODIOLA MODIOLUS Linné. 



T'l. III. Fi-. 24. 



Rekve, ^NrouoLH-. iModiola, fig. 2.— Syst. Conch. Cab., VIII. 3, p. 93.— 

 Wood, Ciag Moll., II., p. 57.— Pilsbry, Cat. Mar. Moll. Jai)an, 

 p. 139.— MiDDENDORF, Älal. Ross., II., p. 21.— Verb. Russ-Kais. 

 :Miiier. Gesell. St. Petersburg, II series, XXXVIII Band, I. 1900. 



Synonym : — M. papiiana Lam., M. vulgaris Fleminc; ; M. larbata L.; 

 Mjjtilus wnhilieatus Pennant ; M. ciirtus Pennant ; M. curviro- 

 strcitiis Da Costa. 



Tabata (very rare). 



Pliocene — Eed Crag (Sutton) and Mamm. Crag (Postwick, 

 Brindlington). 



Post-pliocene — White Sea and the western part of Älurman Sea. 



Living : Tokyo, Hakodate, Setouchi (Inland Sea) ; Sitclia 

 Is.; St. Paul Is. and Kadjak in Behring Sea ; Kildrin Is. in 

 Russ. Lapland, Russia ; whole North Atlantic Coast of Europe 

 and America — North Seas, Scarborough (England), Neeah Bay, 

 Kinnibei Floro (Norway), Eastport (Maine U.S.), New England; 

 and Mediterranean Sea. 



154 MODIOLA AFF JAPONICA Dkr. 

 PI. 111. Figs. 25 a and b. 

 Reeve, Monogr. M(jdiola -Syst. Concb. Cal)., VIII. 3, p. 130. 



Sliinagawa (rarii). 



Living specimens were collected near Tokyo and Hakodate. 



