ox TTTi: OfTTTRREXCE OF TTTE CIEXUR flTCi ANTOrXERTS IX KOREA. 7 



Now, niy opinion on the geological ago of the ÙMun-gyong 

 series lins recx^ived additional support from Pi-of. Zeiller's more 

 recent paper'^ on the fossil flora of Yunnan, in which he 

 records two new localities for this interesting species, namely, 

 Tou-tze (in Sine-si-kouou) and I-Ioui-chao. It is found in these 

 places together witli Pecopteris {Cladophlebis) sp., P. sp., P. 

 {CalUpleridium f) sp., Keuropteridium cfr. hergensc Blaxckexhorx, 

 N. sp., Tœiiiopteris sp., T. sp., cfr. " Annularia " maxima Sciiexk, 

 a stem of an Equisetaceae, and Stigmaria sp. This eminent 

 authority, howevei-, regarded the Yunnan Gigantopteris as speci- 

 fically identical with G. nicotiœnifolia Schenk. 



The coal-bearing series, composed of light yellowish gray 

 soft clnyslate at Tautze and light gray soft clayslate with a 

 slightly purplish tint at I-Ioui-chao, is said to be covered by a 

 conformable upper Triassic sandstone and to overlie a red sand- 

 stone, which in turn is underlaid by a lower Permian limestone. 

 Zeiller remarks that this stratigraphical relation does not, however, 

 conflict with the palaeontological evidence drawn from the fossil 

 plants. Among which are found species characteristic of both 

 the Pala}ozoic and Mesozoic, thus indicating flora in a ti-ausition 

 period. 



From the foregoing it may safely be concluded that the age 

 of the ]Mun-gyong series is most probably Triassic. 



In conclusion, I wish to express my best thanks to Prof. 

 Koto for his kind permission to use his photograph of Kai-youl, 

 and to Prof. Yokoyama and Dr. M. C. Stopes for kindly 

 undertaking the revision of my manuscript. 



1) Zeillkr: Xote sur Quelques Empreintes Végétales des Gites de (!liarl)on dn 

 Yuinian Méridional, p. 10. 



