MESOZOIC PLANTS FROM KOREA. 41 



by the figures, the species so much resembles the Korean in 

 form, size and the venation of the pinnules, that these two are 

 no doubt very closely allied to each other, if not identical. The 

 only distinction lies in a slight difference in venation. 



The Japanese examples of this species have been obtained 

 by Mr. Matsushima from Kinebashi, Uchinami and Otani, Ono- 

 gori, prov. Echizen. 



FILICES? 



SAGENOPTERIS, Presl. 



SAGENOPTERIS BILOBATA sp. nov. 



PI. III., figs. 16a, b, c. 



There are two forms of Sagenopteris hitherto described from 

 the Jurassic deposists of Yorkshire and others, which are usually 

 found together. The pinnules in the one are lanceolate in out- 

 line, while those of the other are cuneate at base ; and these had 

 been kept for a long time as two distinct species, but at present 

 the cuneate form is considered to be an imperfect or abnormal 

 state of the frond of the same species ; thus in the case of the 

 Yorkshire flora, Seward^^ distinguished these two forms under 

 the names oî S. Pkillipsii var. cuneata, and var. major. 



In the Korean specimens, there are two types ; the one re- 

 presented by three examples, shows an outline precisely similar 

 to S. cuneaia or 8. PhilUpsli var. cuneata, while the other three 

 slightly differ from var. major. 



1) Sewaed: Jurassic Flora, I. P. 162. 



