96 ART. L'. — S. TOKUNACA. 



number may be regarded too small to warrant ns in assuming 

 the Tertiarv a2;e of the fossils. It is also interesting to note 

 that there was a decided diminution of temperature as shown 

 by the predominance of arctic forms in the molluscan fauna. 

 Another feature that leads us to think that our fossil zones may 

 be younger than the Pliocene is the discovery of a tusk, teeth 

 and bone fragments of an elephant from a bed below the shell- 

 layer of Tabata. The specimens belonging to tlie same species 

 and collected at other ])hices in Japan were determined by 

 Naumann as FJeplias namadicns Falc, which had formerly 

 been restricted to the Post-pliocene of the Narbada series accord- 

 ing to Blanford ;■•' while Brauns, as before mentioned, took 

 them for those of Elephas antiquus Falc. and Caut. This 

 author, moreovei-, assumed all of the Japanese elephants, includ- 

 ing those from Tokyo, to be Diluvial forms. Therefore I 

 consider the shells formerly taken for Tertiary as belonging to 

 the Diluvial epoch. 



* Nat"MAXX, Uehfj- .J:i))anisrlip f^lppli.inten der ^'<lrzpil. I'ala> int(\<rr,i])liic;i, Rd. 



XXVI 1 1., Heft I., 1881, p. ;;4. 



