6 AKT. 5. — M. YOKOYAMA. 



4. DICTYOPHYLLUM NATHORSTI Zeiller. 



Dictyophyllum Nathorsti Zeiller, Flore Fossile des Gîtes 

 de Charbon du Tonkin^ p. 109, pi. XXIII, fig. 1, XXIV, 1, 

 XXV, 1-6, XXVI, 1-3, XXVII, 1, XXIII, 3. 



Dictyophyllum cf. acutilobum Yokoyama, On Some Fossil 

 Plants from the Coal-bearing Series of Nagato, p. 242, p/. XXXlIy 

 fig. 6. 



No specimen of this plants being found in the Inouye col- 

 lection, I am again obliged to refer to the one previously figured 

 by me in the work above cited. 



At that time, I had called attention to the fact that the 

 teeth in the frond of the Japanese specimen are closer together 

 than in most of the figures of D. acutilobum (Bkaun), given by 

 Schenk and others. And now I am quite convinced that our 

 plant is identical with D. Nathorsti, a species recently created 

 by Zeiller for specimens from Tonkin which he also formerly 

 took for those of Braun's species. A glance at plate XXV of 

 Zeiller's work will show to a certainty that the Japanese and 

 the Indo-Chinese plants belong to one and the same form. 



5. DICTYOPHYLLUM KOCHIBEI Yok. 

 PI. I. Fig. 5, 7. PL II. Fig. 1, 2. 



Dictyophyllum Kochibei Yokoyama, O71 Some Fossil Plants 

 from the Coal-bearing Series of Nagato, p. 244, pi. XXIV, fig. 

 1, la. 



The diagnosis formerly given of this species may be revised 

 as follows : 



