xxi] 



CYATHEACEAE 



371 



fern from Bohemia originally figured as Lepidodendron punc- 

 tatum^ and assigned to a Palaeozoic horizon ; it was afterwards 





Fio. 274. Coniopteris arguta. (Nat. size. From a specimen in the Sedgwick 

 Museum, Cambridge.) 



named by Corda^ Protopteris Sternhergii and referred by 

 Brongniart^ to Sigillaria. The genus Protopteris stands for 



1 Sternberg (20) A. PI. iv. 



2 Corda (4-5) A. PI. ii. fig. 5. 



Brongniart (28) A. PI. XLI. 



