MESOZOIC PLANTS FEOM KOREA. 53 



very noteworthy, however, that the species is absent in the Oolitic 

 flora of Kach, though common in the older Eajmahal group. 



On the whole, so far as evidence goes, the writer has little 

 hesitation in announcing the contemporaneity of the Naktong flora 

 of Korea with that of the Japanese Tetori series, the affinity of 

 the former to those of the corresponding age in Siberia, China, 

 India and CaUfornia being apparently more distant. 



Nature of the plant-bed of Naktong : — Next the question 

 arises whether the plant bed is a fresh water deposit or not. In 

 this connection, the following facts must be taken into considera- 

 tion. 



1) There are very few animal remains ; a very incomplete 

 bivalve and few Foraminifera with perforated calcareous shells 

 were found in the same deposit. 



2) There is no trace of marine plants. 



3) Plant impressions of a more or less large size are generally 

 arranged in the plane of stratification, often heaped one upon 

 another. 



4) In some parts, however, only crumbled pieces of plants 

 are accumulated. 



From the above facts, it is to be inferred that the deposition 

 took place at least not far from the sea coast and there is a 

 probability that the deposit was a beach formation in very shallow 

 brackish water. 



