MESOZOTC PLANTS FROM KOREA. 9 



upper K3^()iig-synni]!; fornuition and hence of the dislocation of tlie 

 Korean and Hansan systems, but also of the geographical dis- 

 tribution of the middle Mesozoic flora. 



The study of the flora, above alluded to, was first suggested 

 to the writer by Prof. B. Koto, by whose encouragement the 

 writer had the opportunity to twice visit the territory under dis- 

 cussion. It was first intended that this note should be included 

 in the more comprehensive work on Korean geology by this 

 professor ; but by kind permission, it is now given an earlier 

 publication. 



The writer is also indebted to Prof. ]M. Yokoyama for 

 assistance in regard to palseontological points and for a painstak- 

 ing revision of his manuscript. 



Acknowledgment is also due to Prof. K. Mitsukurt, Di- 

 rector of the Science College, and to Prof. I. Ijima, of the 

 publication committee of the Journal. 



DESCRIPTIONS. 

 CYCADOPHYTA Nathorst. 

 DICTYOZAMITES Oldham. 



T. Oldham'^ speaks of the genus Dictyozamites as " very 

 interesting as a fossil plant, but of no importance in the determina- 



1) T. Oldham and J. ISfoRKis: Fossil Flora of the Rajaniahal Series in the Eajamlial 

 Hills. 186?.. 



