26 ART. S. H. YABE. 



what Heer, Prof. Yokoyama and others described as Thyrsopteris ; 

 and it is also in some respects not unlike 0. capsulifera. 



In this connection, the present writer figured (pi. I., fig. 12) 

 a specimen from Shimamura, Prov. Kaga, one of the localities 

 in Japan which are prolific of Jurassic plants. It shows a 

 character very much like Schenk 's Thyrsopteris elongata, and at 

 first it was taken for the same. But on making a thorough 

 examination of the fertile portion of the frond, it was found not 

 to belong to the genus Onychiopsis but in all probability to 

 Coniop)ie7'is. Although the plant will not be described here, the 

 above fact forces the present writer to doubt Schenk's determina- 

 tion above alluded to. 



CYATHEACEAE. 

 CONIOPTERIS Bronyniart. 



(Tableau Foss. Veg. p. 26). 



In agreement with to Sapoeta, Solms Laubach and Seward, 

 the following fossils are described below under the generic name 

 of Coniopteris, on account of the external resemblance of their 

 fructification to that of some recent genera of Cyatheaceae 

 (especially of Dicksonia and Thyrsopteris). For such forms, 

 some authors are accustomed to use the generic names of the 

 living ones, even when the real nature of the sori and sporangia 

 is unknown. 



