MESOZOIC PLANTS FROM NAGAïO AND BITCHU. 3 



already found in the Rhœtic of Europe. Therefore we may 

 safely conclude that at least the upper portion of the plant-bearing 

 series of Yamanoi belongs to the uppermost Keuper, or E-hietic 

 as it is generally called. 



DESCRIPTION OF THE SPECIES. 



1. CLADOPHLEBIS NEBBENSIS (Brgnt.). 



PI. I. Fig. 1-3. 



Cladophlebis nehbensis Nathoest, Bidrag till Sveriges fossila 

 Flora, p. 16, pi. II, fig. 1-6, pi. Ill, 1-3. Möllee, Bidrag till 

 Bornholms fossila Flora, Pteridofyter, p. 29, pi. II, fig. 22, ^/. 

 ///, fig. 1. Zeillee, Flore Fossile des Gîtes de Charbon du 

 Tonkin, p. 45, pi. IV, fig. 2-4. 



Pecopteris nehbensis Beongniaet, Histoire des Vêgêt. Foss., 

 p. 299, 2^1- XGVIII, fig. 3. 



Äsplenium Rœsserti Yokoyama, On Some Fossil Plants from 

 the Coal-bearing Series of Nagato, p. 241, pi. XXXII, fig. 1-5. 



This fern which I formerly took for Cladophlebis [Asplenium] 

 Rœsserti (Peesl.), a well known Rhœtic form, proved to be a 

 different, but still very closely related s]3ecies of the same form- 

 ation, viz. Cladophlebis nehbensis (Begnt.), as has already been 

 pointed out by Zeillee in his excellent work on the fossil flora 

 of Tonkin, above cited. This author who studied specimens of 

 both species occurring in Tonkin says that the pinnules of Cla- 

 dophlebis nehbensis, besides being denticulated at least in the 

 posterior and middle portions of the frond, are generally larger 

 and broader, with apex more rounded and margins more parallel 

 than those of Cladophlebis Rœsserti. He adds moreover that in 



