XXVIl] 



AUCHAEOPTERIS 



561 



Baily are distinguished by the nature of their fertile pinnae 

 from the sterile leaves included in Brongniart's provisional 

 genus Cyclopteris. The earlier use of Palaeopteris by Geinitz 



Fio. 368. Archaeopteris hibernica. (From a specimen in the Science and Art 

 Museum, Dublin. Rather less than | nat. size.) 



