FROM KOZUKE, KU, AWA, AND TOSA. 213 



Description of the Species. 

 Filices. 



1. Thyrsopteris sp. 

 PJ. XXIII, Figs. 2, 3. 



On u piece of .-^toiie, represented in fig. 2, tliere ure many elongated 

 pinuie apparently l)el(jnging to a twice pinnated frond. They taper 

 very a"i">duallv forward, and seem to be tolerably distant. The 

 pinnules are long, alternate, more or less directed forwards. cl<jse 

 together, and sharply toothed. Tlie general appetirance of the fern 

 reminds iis of the many species of Thyrsopteris hitherto described 

 frcjm the Jurassic and Cretaceous rocks. It also closely resembles 0/i//- 

 cliiopsis donijaia tleyl. (see further on), which possesses, howeyer, more 

 acutely directed pinnules. It is to be regretted that the lateral yeins 

 are so indistinct Jis not to permit of any stricter comparison with the 

 already known forms being made. 



Fig. o })robably re[)resents an upical part oï the same fern. 

 Pinnules are here linear and not luilike those of iVc'a|'/6'r/>; ■i'//-j/////t7<.s/.!> 

 Font, described below. 



Loc. — Fujikawa, in the Katsuragawa basin. 



2. Dicksonia tosana ///. 



PI. XXV, Figs. 13, 13(^ 



Frond tripinnated ; racliises of various orders rather slender ; priinarij 

 rachis lent someirhat zigzafi, others nearhj straifjlit ; primarij pinna' 

 elongated, distant, rising at nearJij right angles to tlie rachis ; secondarg 

 pinnic comparatirelii sjiort, alternate, close togetlier and a little overlapping, 

 tliose on the bach of tlie racliis heing more acatelg directed forward and 



