JURASSIC PLANTS FROM KAGA, HIDA, AND ECHIZEN. 55 



dicatioD of a stalk except in fig. 8, which shows a short but distinct 

 one. 



The mode of venation is exactly as Feistmantel describes and 

 figures. Fine, equal, numerous veins proceed from the base to the 

 apex and margin of the leaflet, in such a way as to form long and 

 narrow nets along its median line, and shorter and polygonal ones 

 around its periphery. 



Agreeing in all of the above mentioned characters, our plant is 

 distinguished from the Indian one in having the leaflets not so closely 

 set along the rhachis as in the latter. On this account I think it 

 better to raise it to a distinct variety (see fig. 4). 



This species is said to be highly characteristic of the Eajmahal 

 Group in India. Its discovery therefore in the Jurassic system of 

 Japan is especially noteworthy, as at Ozô it has been found associated 

 on the one hand with a Sagenopteris closely akin to S. rhoifolia Presl. and 

 on the other with the common Oolithic types such as Asplenium 

 argutuhim, A. distans, and Onychiopsis elongata. 



This is the most numerous fossil at Ozo, where it takes the 

 place of Podozamites lanceolatus of other localities, of which indeed not 

 the least trace is here to be found. Rarer at Ushimaru. 



Loc. — Ozo, Ushimaru. 



36. Dietyozamites grossinervis m. 

 PL VII, fig. 10. 



Leaflets longly ovate, very shortly petioled at the middle of the 

 base ; basal corners subauriculate ; veins equal, coarse, rising at the 

 base of the leaflet and radiating, forming elongated nets which are longer 

 in the middle and shorter towards the apex and margin of the leaflet. 



This species is closely akin to the preceding, in fact agreeing with 

 it in the general form of the leaflets, their mode of attachment to the 



