Dr. H. Yale — New Pleistocene Fauna from Tokyo. 211 



long abandoned, great sand-ditches along the Owu line, where very- 

 prolific shell-beds were once exposed. The detailed account of these 

 fossiliferous beds and their contained fossils are given by Mr. S. 

 Tokunaga l in his work " Fossils from the Environs of Tokyo", 1906, 

 from which the following lines are quoted for the sake of comparison : — 



" The brownish and bluish clay layers at the bottom of my 

 profile [which on p. 93 shows the downward succession of loam 

 5-78 metres, clay - 6 metre, gravel 60 metres, and brownish and 

 bluish clay] contain different kinds of fossils at different parts even 

 of the same horizon. In some parts we find numerous plant-leaves, 

 while in others trunks of trees and shells. Where the shells are 

 numerous, the clay passes into sands. . . . Below the clays is found 

 a bluish sand which yields some molluscan casts at Shinagawa and 

 Oji, and numerous shells at Tabata. At the last locality no bed lower 

 than this sand is exposed. But at Shinagawa and Oji there is a sand 

 with numerous shells, showing a wavy line of boundary against the 

 overlying sand on natural profiles." 



It may be here remarked that the boundary question of Diluvium 

 and Pliocene was much discussed by D. Brauns, T. Suzuki, Tokunaga, 

 and others, in reference to this wavy line above the principal shell- 

 bed of Oji. A similar and even sharper wavy line is seen between 

 the sandy gravel bed and the underlying brown clay at Tabata ; at 

 the end of this paper the question will be shortly referred to. 



mollusca, etc., from the shell-bearing sands and overlying 

 Argillaceous Bed of Tabata. 



MOLLUSCA. 



Gasteropoda. 



Rapana bezoar, L. 



Nassa japonicct, A. Ad. 



N. livescens, Phil. 



Columbella martensi, Lischke. 



C. pumila, Dkr. 



Drillia tabatensis, Tok. 



Natica ampla, Eve. 



Scalaria lamellosa, Lam. 



Eulima ovalis, Tok. 



Pyramidella spirata, A. Ad. 



P. cinctella, A. Ad. 



Cerithium nipporiensis, Tok. 



Cerithiopsis tabatensis, Tok. 



Lampania zonule, Brag. 



Potumidesfluviutilis, Potiez &Mick. 



Rissoa (Fenella) cf. cerithina, Phil. 



R. septentrionalis, Tok. 



R. subcylindrica, Tok. 



Rotclla costata, Lesson, var. 



superbus, Gld. 

 Turbo granulatus, Gmel. 

 Acmceu conulus, Dkr. 

 Patella (Heliconiscus) amussiata, 



Beeve. 

 Tornatina exilis, Dkr. 



Ringicula arctata, Gld. 

 Cylichna 7nusashiensis , Tok. 

 Bulimella obtusa, Tok. 



Lamellibranchia (or Pelecypoda). 



Martesia striata, L. 



Solen krusenstemi, Sckrenk. 



Saxicava arctica, Desh. 



Tellina jedoensis, Lisckke. 



T. serricostata, Tok. 



Macoma nasuta, Conrad. 



Cyclina chinensis, Ckem. 



Tapes decussata, Dkr., Nax.philippi- 



narwm, Ad. & Eve. 

 Lascea striata, Tok. 

 Area inflata,, Eve. 

 A. tenuis, Tok. 

 A. granosa, L. 

 Modiola modiolus, L. 

 Anemia aff. patelliformis, L. 

 Ostrea tokunagai, Cossmann. 



PISCES. 



Myliobatis sp. 



MAMMALIA. 



Elephas antiquus, Fal. 

 Indeterminable ungulate bones. 



1 Journ. Coll. Sci. Tokyo, vol. xxi, art. 2, p. 93, 1906. 



