Adams — The Distribution of Lichens in Ireland. 



227 



Verrucaria — continued. 



submersa Borr. = Porina chlorotica Wainio. 

 Taylori Carroll = Arthopyrenia Taylori Mudd. 

 theleodes Snwirf. = Polyblastia theleodes Lonnr. 

 trachona Ach. = Porina chlorotica Wainio. 

 umbrina Whlnh. = Polyblastia umbrina ( Whlnb.) 

 umbrosa Tayl. = Opegrapha saxicola Ach. 



CENSUS OF SPECIES. 



The number of species known to occur in each of the twelve sub-provinces 

 of Ireland is as follows : — 



Sub-proyince. 



Species. 



Sub-province. 



Species. 



Ml 



429 



Li 



31 



Mz 



267 



L2 



182 



M3 



88 



L3 



10 



Ci 



466 



Ui 



174 



C2 



32 



V 2 



186 



03 



8 



U3 



12 



The number of species occurring in each of the four provinces of Ireland 

 is as follows : — 



M C L U 



525 481 198 297 



The total number so far found in Ireland (not including the doubtful 

 species) amounts to 779 species. 



It will be evident from the above figures that very little is known of the 

 Lichens occurring in half the sub-provinces of Ireland. 



GENERAL REMARKS ON DISTRIBUTION. 



{a) Ieish Species not found in G-eeat Britain. 



The following 129 Irish species have not so far been found in Great 

 Britain : — 



Anthracotlieciuin pyrenuloides Mull. 



Arg. 

 Arthonia 



anastomosans Ach. 



atrofuscella NyL 



excipienda Nyl. 



Artboiiia — continued. 

 hibernica Nijl. 

 ilicinella IS'yl. 

 paralia Nyl. 

 punctella Nyl. 

 sapineti Nyl. 



[2L*] 



