JONES — ON THE IKISH LICHENS. 115 



Sixty-four of these Lichens are not found in the " Flora Hibernica," 

 and it may be supposed that Dr. Taylor did not claim them as Irish 

 Lichens ; on the other hand, a considerable number of the species re- 

 corded by Drs. Taylor and Mackay in the "Flora Hibernica" are not 

 found in this Collection, and it is to be hoped that younger and more 

 active lichenists will soon make good these deficiencies. 



There are amongst these Lichens six new species ; these have 

 been named by Dr. Nylander ; but they are not as yet published. I 

 hope, however, that the descriptions of them will appear during this 

 year in the "Flora" published by the Royal Botanical Society of Regens- 

 burg. 



With this Collection I have the pleasure likewise to present to 

 the Society a copy of Mudd's "Manual of British Lichens." This is 

 the latest work on English Lichens. I do not myself adopt its nomen- 

 clature, but have often referred to it whilst naming these Lichens. Mr. 

 Mudd has devoted much labour to it, and to the inquiring lichenist its 

 copious synonyms and references must be found very useful. But I think 

 it necessary to say that I cannot accept Mr. Mudd's measurements of 

 spores. Moreover, the paragraph relating to the measurement of spores, 

 at page v. of the Introduction, seems to me especially obscure. In my own 

 experience I have never met with the spore of a Lichen in length -01 of 

 an English inch ; but, according to Mr. Mudd, spores of this size are of 

 common occurrence — nay, he even gives the spores of Pertusaria velata* 

 as -05 to -06 of an inch in length. It will therefore be found, where 

 I have given the measurements of the spores, that those measurements 

 will not coincide with those recorded for the species in Mr. Mudd's 

 work. 



In handing over this Collection to the Society, I would only stipulate 

 that any specimen should not, by those who may consult it, be cut up 

 or mutilated ; and I trust that it will receive fresh accessions, with a 

 view to filling up the desiderata, at the hands of the members, towards 

 which my own future exertions shall not be wanting. 



In the accompanying List the number prefixed to each name is that 

 borne by the representative specimen in the Collection, and the initials 

 appended after the locality are those of the collector. An asterisk (*) is 

 prefixed to those species which are new to Ireland, — that is to say, those 

 which are not recorded in Dr. Mackay' s " Flora Hibernica." 



The following is the List of Lichens in the Collection now presented 

 to the Society, the Genera and Species being, for facility of reference, 

 respectively arranged alphabetically : — 



Abeothalltts (De Not.). 

 *No. 76. — Abrothallus Smithii (Tulasne). Near Roundwood. T. J. 



* "Manual of British Lichens," p. 274. 



