52 AET. 8. — H. YABE. 



Schmalhausen/^ Newberry^^ and Beongniart^^ have described 

 many Jurassic and Rhaetic plants but there is relatively little 

 resemblance between these and the Korean flora. The identical 

 or closely allied forms are restricted to those fern types of a 

 very wide vertical and horizontal distribution. Among the Meso- 

 zoic plants, now in Prof. Yokoyama's possession, brought from 

 various parts of Northern and Southern China, there are also no 

 particular forms which indicate the presence of a close floral 

 relationship with the Korean fossils. 



The Oroville flora^^ of California is the best known of the 

 Mesozoic vegetations in the Pacific border of North America. 

 It is assigned to the Oolitic age. The predominance of Ptero- 

 phyllurtiy Ctenis and Ctenophyllum consititutes a peculiar feature 

 more or less like that of the Jurassic flora of India. But between 

 this North American and the Japanese Tetori floras, there is 

 only a slight resemblance though they are nearly contemporaneous ; 

 the distinction between the former and the Korean flora is more 

 striking, apparently none of the species being either allied or 

 identical. If what Fontaine calls Pinus Nordenshjoldi is really 

 identical with the plant so named from Korea, then it is the 

 only species which shows any relation between the two floras. 



In some respects, the Jurassic flora of India, seems to be 

 more closely related to the Korean. There is in common the 

 important species, Dictyozamites faleatus, above alluded to. It is 



1) ScHMAliHAUSEN : Pflanzen aus der nordwestlichen Mongolei. 



2) Newbekry: Notes on Some Fossil Plants from Northern China. Description of 

 Fossil Plants from the Chinese Coal-bearing Rocks in R. Pumpelly's Geological Researches 

 in China, Mongolia and Japan. 



3) Bkongniaet : Note sur les Plantes fossiles de Tinkiako envoyés en 1875 par M. 

 l'Abbl. A. David. 



4) Wabd : Status of the Mesozoic Floras of the United States. The Older Mesozoic. 

 P. 340. 



