THE LICHENS OF PERTHSHIRE 
BEING A PRELIMINARY LIST OF SPECIES 
FOUND WITHIN THE THREE VICE-COUNTIES 
BY 
J. A. WHELDON, F.L.S., & ALBERT WILSON, F.L.S. 
> 
IssueD as A SUPPLEMENT TO ‘JouRNAL OF Borany,’ 1915 
LONDON 
WEST, NEWMAN & CO., 54, HATTON GARDEN, E.C. 
1915 
