MESOZOIC PLANTS FROM NAGATO AND BITCHU. 



of the posterior side of the pinnae compells me to treat it now 

 as a new species. In the form and venation of the pinnules, our 

 specimens show a close resemblance to those figured and described 

 by Heer as Asplenium whitbiense var. tenuis {Beitr. z. Juraflora 

 Ostsib. It. d. Amurl, p. 39, pi III, fig. 3) from Siberia, which, 

 however, have the pinnœ so close together as to partly overlap 

 one another. A plant described under the same name from the 

 Jurassic of China {Schenh in Richthofen's China, vol, IV, pi. 

 LII, fig. 1) has the pinnae further apart, but the veins are some- 

 what denser, and moreover there is not the peculiarity of the 

 posterior pinnules before mentioned. 



Specimens of this plant are not found in the collection of 

 Mr. Inouye. Therefore the only ones which are at hand are 

 those formerly figured by me in the work above cited. For this 

 reason the figures are not given here. 



3. DICTYOPHYLLUM JAPONICUM Yok. 



PI. II. Fig. 3. 



DictyophylliLm japonicum Yokoyama, On Some Fossil Plants 

 from the Coal-bearing Series of Nagaio, p. 243, pi. XXX. 



Among the specimens collected by Mr. Inouye, there is a 

 fragment of a basal portion of a frond in which the more or 

 less palmate nature of the pinnae is well shown. As may be 

 seen from our figure, the primary rachis is divided apparently 

 into two very divergent branches, each carrying on its upper or 

 front side several pinnae which are separated from one another 

 by a short space and assume a more less fan-shaped appearance. 



Very frequent. 



