JURASSIC PLANTS FROM KAGA, HIDA, AND ECHIZEN. 25 



Closely akin to the preceding, but distinguished in having more 

 sharply pointed pinnules and dichotomous secondary veins. A speci- 

 men here figured (fig. 2) shows slender pinnae with acutely directed, 

 lanceolate pinnules, which are therefore narrower than the majority of 

 those figured by Heer. They correspond more to those represented 

 in the left-hand extremity of Heers figure. Fig. lb shows a fragment 

 of a pinna with long acute pinnules whose inferior veinlets are 

 dichotomous (fig. 2a) ; so it is probably one of this species. Yet on 

 account of the narrower nature of the pinnules as compared to those 

 described by Heer, I name the Japanese form a variety. Very rare. 



Loc. — Shimamura. 



6. Dickson ia cf. Glehniaiia Heer. 

 PL XIV, fig. 11, 11a, 12a. 



Dicksonia Gleliniana — Heer, Beitr. zur Juraflora Ostsib. u. d. 

 Amur!., 1876, p. 91, pi. XVII, fig. 4, XVIII, 6, 7. 



Heer's diagnosis runs as follows : 



" Frond bipinnated, coriaceous ; pinnae alternate, acutely directed 

 forward, narrow ; pinnules oval, strongly oblique, narrowed at base, 

 decurrent, entire, apex obtuse ; veins very fine." 



In the alternate, obliquely-oval pinnules, obtuse at apex and with 

 simple lateral veins, our specimens agree with the figures and descrip- 

 tions of Heer, but they are too meagre and fragmentary for an exact 

 determination. The substance of the frond, just as Heer says, seems 

 to have been quite thick. Fig 1 . 11a is an enlarged view of fis:. 11. to 

 show the veins more distinctly. 



According to the investigations of Prof. Nathorst, this species is 

 doubtfully represented in the Oolite of Yorkshire. Loc. — Hakogase. 



7 Dicksonia nephroearpa Bunb. sp. 

 PI. I, fig. 1, la. 



S pli en opter is neplrrocarpa — Bunbury, Quart. Journ. of Geol. Soc. , 



