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X. 



THE DISTEIBUTION OF LICHEXS IN lEELAXD. 



By J. ADAMS, M.A. 



Plate XIII. 



Eead May 10. Ordered for Publication May 12. Published July 17, 1909. 

 CONTENTS. 



Page 

 Introduction . . . . .193 

 Sub-divisions of tbe Country . . 194 

 Classification . . . . .195 

 List of Genera and Species . . .198 

 Doubtful Species 209 



Page 

 List of Synonyms . . . . .210 

 Census of Species ..... 227 

 General Remarks on Distribution . . 227 

 Bibliography 231 



Introduction. 



While there are a few scattered references in the earlier literature to Irish 

 Lichens, the first published papers of any importance dealing with the group 

 were those of Wade. In 1802 there appeared a list of 26 species found in 

 Co, Galway ; while in his " Plantse Eariores," published in 1804, 85 species 

 were enumerated, localities being given for about half of these. Erom that 

 date there is very little published information on the subject until the 

 appearance of Mackay's " Flora Hibernica," in 1836, the section on Lichens 

 being written by Dr. Thomas Taylor. Many of the localities mentioned in 

 this work were supplied by Templeton and Miss Hutchins, two most enthu- 

 siastic investigators of this as well as of other sub-divisions of the Irish 

 Flora. Taylor's account of Irish Lichens contained 292 species. These, 

 together with 7 species in the Addendum, and two which were regarded at 

 that time as Algse, give a total of 301 species. This was the first and up to 

 the present the only summary of Irish lichens as a whole. 



In 1845 there appeared in Power's Flora of Cork a list of 144 species 

 observed in that county. From that date onwards little seems to have been 

 published until the time of Mr. Isaac Carroll and Admiral Theobald Jones. 

 A list of papers published by them will be found in the Bibliography ; and it 

 is not too much to say that a very great deal of our knowledge of the present 



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