4 ART. î). — 31. YüKOYAMA. 



1. Anfj'wpterldium cf. infarcium Felsïm. 



'2. ClaUiropterü SP. 



3. Pliœnicopsis f Yamadai x. sp. 



These plants are contained in a fine-grained greenish grey 

 sandstone in whicli the venation of the leaves is for the most 

 2)art imperfectly preserved, so as to make their determination 

 extremely difficult. Notwithstanding this fact, the presence of 

 Ang'iopierid'nim cf. infarcliuii Feisï^i. in the florulas of the two 

 places shows that in all probability they belong to the same geo- 

 logical horizon. 



As to the age of the plant-l)eaiing rocks, the only species 

 available in determining it is the above mentioned Angiopleridium. 

 Angiopteridiiim infarcium is a form described from the Upper 

 Gondwana of India which belongs to the Triassic. Therefore it 

 is most likely that the Yiin-nan plants represent some part of 

 the Triassic. Whether they are contemporaneous with the Khœtic 

 forms described by Prof. Zeiller from Tai-p'ing-ch*ang, a place 

 more to the west in Yiin-nan still remains to be confirmed. 



II. JURASSIC PLANTS. 



By far the greater part of the fossils treated in this paper 

 belong to the Jurassic. They are from five provinces, or 8hôngs, 

 as they are called by the Chinese. 



A. Ssu-ch'uang-Shêng.'^ 



The plants come i'rom three j>laces in this province, and all 

 were collected by Prof. Yamada. 



1) w;iit 



