a 9 



M. YOKOYAMA. 



The specimens from Ozö have the pinnae a little more acutely 

 directed forward than in the typical forms, with some of the falcate 

 and blunt pinnulae more closely set together, thus reminding us also 

 of the sterile pinnulae of Pecopteris Williamsonis Brgt. (e. g. Hist. 

 Yégét. Foss., pi. CX, fig. 12) the original specimen of which I had an 

 opportunity of examining in the museum of Stockholm. 



Loc. — Shimamura, Ozö. 



13. Asplenium argutulum Heer. 

 PI. Ill, fig. 1. PI. XII, fig. 8. PL XIII,fig. 9. PI. XIV. fig. 2. 



Asplenium argutulum — Geyler, Ueber foss. Pflanz, a. d. Juraform. 

 Japans, p. 225, pi. XXXI, fig. 1. Hear, Beitr. zur Juraflora Ostsib. 

 u. d. Amurl., 1876, p. 41, pi. Ill, fig. 7, p. 9(3, pi. XIX, fig. 1-4. 

 Schenk in Kichthofen's China, vol. IV, part X, p. 246, pi. XLVI, 

 fig. 2-4. Schmalhausen, Beiträge zur Juraflora Russlands, p. 23, pi. 

 II, fig. 12. 



This species is a close ally of the preceding, hut with pinnules 

 narrower, straighter, and more acute at apex. A specimen from 

 Shimamura (PI. Ill, fig. 1) shows sonn 1 - of the pinnules crenulate, on 

 which account it may be prudent for the present to consider it as a va- 

 riety. That from Hakogase figured in Plate XIV has also a great 

 resemblance to some forms of Pecopter.s Phillipsii Brgt.=P. cxilis Phitt. 

 (comp. Brongniart, Hist. Végét. Foss., pi. CIX, fig. 2). 



This species like the preceding has a wide geographical distribu- 

 tion, as it is also mentioned from Yorkshire by Prof. Nathorst. 



Not frequent. Loc. — Shimamura, Ozd, Hakogase, Okamigô. 



14. Asplenium distans Heer. 

 PI. Ill, fig. 2. PI. XI, fi. 4. PI. XIII, fig. 4. PI. XIV, fig. 1. 

 Frond pinnated ; pinnae elongated ; pinnules either free or unit- 

 ed at base, lanceolate, entire, more or less falciform, acute at apex ; 



