34 M. YOKOYAMA. 



another from the same locality with more pinnules preserved ; but 

 they are so mutilated, and in part so indistinct, that I thought it not 

 worth while to figure it along with decidedly better, though more 

 fragmentary, specimens. 



This species described from Gristhorpe and the Amoor regions, 

 though obtained from the four localities, seems to have been frequent 

 in none of them. Loc. — Shimamura, Ozo, Hakogase, Ushimaru. 



Fam. 2. Sphenopterideae. 

 6. Sphenopteris Brgt. 



15. Sphenopteris sp. 

 PL XIV, fig. 13, 13 a. 



I obtained only a fragment of this fern, which I believe is 

 to be placed in the group of Sphenopteris Darallioides Scliimper. 

 My specimen belongs to the upper extremity of a frond, or 

 perhaps of a primary pinna, and shows five long linear pinnules, 

 two on each side and one at the apex. These pinnules are all close 

 together, obtuse at the apex and acutely directed forward. They mea- 

 sure about 7 mm. long and only 1 mm. broad, each pierced with a 

 single delicate vein in the middle (fig. 13 a, enlarged). 



I know none among the Oolitic plants that can aptly be com- 

 pared to this species, except Sphenopteris Williamsonis Brgt. from 

 Yorkshire (Lindley, Fossil Flora, p. 131, pi. 131). the greater part of 

 the group of Davallioides being hitherto known from the Palaeozoic 

 flora. Our plant is also not unlike Sphenopteris Mantelli Brgt. of the 

 WYalden (Schenk, Flora d. Norddeutschen Wealdenformp. 208, pi. XXV, 

 fig. 6) in the formation of the pinnules (comp. 6 a, pt. XXV of 

 Schenk). However our specimen is too imperfect for a strict specific 

 determination. Loc. — Hahogase. 



