THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Yol. XIII. (I.S.), lo. 9. JWE, 1911. 



THE OCCURRENCE OF ARCHJE0PTBRI8 



T8CHERMAKI, Stur, AND OF OTHER SPECIES 



OF ARCHJi]OPTERIS IN IRELAND. 



BY 



T. JOHNSON, D.Sc, F.L.S., 



PEOFESSOE OF BOTANY IN THE EOYAL COLLEGE OF SCIENCE FOR IRELAND. 



(PLATES VII., VIII.) 



{A ufhors alone are responsible for all opinions expressed in their Communications-^ 



DUBLIN : 

 PU]?LISHED BY THE EOYAL DUBLIN SOGlE'rY, 



LEINSTER HOUSE, DUBLIN. y\A\\\SOm?.n in^h,,^ ' 



WILLIAMS AND NOKGATE, /^ ^ '^'-: 



14, HENRIETTA STREET, COVENT GARDEN, LONDON, W.\c. ^*^^ 14iC.|| 



IQll x'^/' 



Price One Shilling. 



