Mesozoic Plants from Kozuke, Kii, 



Awa, and Tosa. 



Bv 



Malajiro Yokoyama. Rié^kushi, Riéakuhakushi. 



Professor of Palioontology, Imperial University. 



General ReiTiarks. 



In ISIH). Prof. A. G. Xuthorst, of Stockholm, published a very 

 valnaljle pa])er on the fossil plants of Shikokii entitled Bchviiije zur 

 mcso:oi^r]ien Flora Jnjnuis'^ The present treatise dea.ls Avirh the same 

 sul)ject, and indeed partly Avitli tlie fossils therein described. 



AYhen I ^vrote my memou' on the ^Middle Jurassic flora of Kaga 

 and its neigddDouring provinces,-^ I thought that the ])lants occurring in 

 Sliikoku also l)el(^ng to the same geological epoch ; but as meanwhile 

 the investigations of the Swedish palœol)otanist had shown tliem to be 

 decidedly younger tlum the Kaga flora, namely, either Upper Jurassic 

 or Wealden, I deemed it advisable to extend the im'estigations further 

 than he had carried it. and if ])ossil)le. obtain a more ])recise knowledge 

 as to the age in which the Shikoku plant-beds were deposited. AVith 

 this view I have been eno-ao-ed for some vears in üatherino- as inany 

 specimens as possible, not only fr«:)m the localities whence Xathorst 

 obtained his material, but also from several other places where similar 



1) Ik'iiliscliriftcn do- iiiat]icmati:ich-natunris^en>tc]iaftlichi'ii Clnm^i' (h'r ludi^erliclicn Aladcmie 

 der lVis>'cn>:rhnft('ii, Wien, IJd. LVII, 1890. 



2) Yokoyama. — Jurnsxie Phnit!^ fro)n Kaga, Hidn, and Fj'hi:en. Journal of the ddlccjc of 

 Scient'f. Tiiipi'riitl I'liiri'r.'iitii, J<i]jini, ml. Ill, ]f<S9. 



