6() 



tlie tertiary stnit^i nrv hoch to ouitain ii shell- layer, not very imicli uliovu tlio 

 level of the sen nml «inking nejirer and nciiR'r to it beyond the coal-ntores 

 and other iiidiistriiil c^tahlishineiits which are here huilt Imtwcon the stniml 

 and the hliitV. For a short distance, the layer descends nearly to the 8tnin<l, 

 wliilst hlo-.-ks of tertiary nicks ttimb!L>d dow-n ar« Kaitterwl along the shore. 

 Here I collected, jxirtly in these hlocks, lint mostly in the native shell-layer, 

 a small numl>er of shells, takiiig of course very jjn-at care not to mistake 

 recent shells, for inst^mce oysters which cover some of the blocks, for tertiary 

 ones. It may bt^ remarked, however, for this and for many other localities, that 

 the state of prcä^crvation mostly siiflicetl to prevent stich a mistiike; for excellent 

 as it sonntimes was (exhibiting in many cases even traces of color, or nacreous 

 lustre), yet all the tertiary shells were une<}uivt)cally fossil, resembling in every 

 n.'sjK'ct certiiiu European tertiary shells, e. g. tlie Viennese, Antwerp and Tou- 

 raine iniocene shells, or those of Grignon, biit above all the sul)a[K-nnine fossils. — 

 The diluvial rocks— which also descend very low, just alnive the ^hell layer — do 

 not contain any well preserved shells (indeed scari-ely any shells at all), and are 

 so different from the tertiary tufaceous clays and shell-beds that there is no 

 difficulty in distinguishing the blocks. 



LIST OF SPECIKS. 



Neptunea arthritica Valenciennes. — (Sec Oji, Shinagawa.) 



Nassa japonica Adams. — (do.) 



Purpura lapillus L.— (See Shinagawa.) 



Lampania zonalis Lamarck.— (See Snniga<lai, Shinagawa. I 



Panopaesi generosa Gould. — (See Oji, Suruga<lai. Shinagawa.) 



Tellina nasiita Conrad.— {See Oji, Sumgadai, Shinag-awa. ) 



Dosinia exolcta L. — (See Oji, Surugailai, Shinagawa and Kanagawa.) 



Cardium Californiense Desh. — (See Oji, Surugadai, Shinagawa.) 



Laevicardium bnllatum Ad.— (do.) 



Arcjv inflata Kceve.— (See Oji, Suniga«lai.) 



Area sul)crenatu Li.schke. — (See Oji, Sumgadai and Kanagawa.) 



IVrtuncuhis glycimerLs L. — (Sec Oji, Shiiiag.iwa.) 



Peeten laqueatus Sow. — (See Oji, Shinagawa.— Found frequently in the 



eastern j)art of the Bluff.) 

 OstR'a gigas ThunVrg. — (See Oji, Sumgadai, Shinagawa and Kanagawa.) 



To these 6[H3cies mentioned already from Tokio two more are to l>e a<lded : 



Dolium lutennfofiium Kiister. 

 (2d Oil. of Chemnitz, Conchyl.-Cab. v. 3, Abth. I, pt. 2, p. 6G, pi. 58.— 

 Lisclike, Japan. Meercs-Conch. r. 1, p. GS and v. 2, p. ST.— According 

 to this autlior, the species is synonymous to I), japonicnm Dunker, Novit, 

 conchol. V. 2. 1». 104, jil. 3.") and 36; and to D. varieg;vtuni Küster, 1. c. 

 !> 74. and Sehniick. nordjapan. iloll. p. 401, noii Lamarck.) 



