278 GUERNSEY. 
LICHENS. 
NINETEEN lichens are included in Gosselin’s list of Guernsey 
plants, dated 1788, and the quaint old names are interesting, all the 
species being included in one comprehensive genus, Lichen. They 
are as follows :—Lichen verrucosus parietinus, stellaris, perlatus, 
nigrescens, farinascens, calicaris, fraxineus, prunastri, caninus, pyxi- 
datus, fimbriatus, rangiferinus, furcatus, fuciformis, roccella, crocatus, 
corniculatus, and tinctorus. Fifty years later a catalogue of about 
140 Guernsey lichens, prepared by Mr. F. C. Lukis, the well-known 
local antiquary and naturalist, was given as an appendix to Babington’s 
Flora Sarnica. The great bulk of these species are known to occur 
in the island at the present time, but there are some which cannot 
be admitted as natives without further evidence; and as the list 
includes, without comment, such lichens as Cefraria nivalis and 
Parmelia stygia, it should only be accepted as furnishing the earliest 
published record of species which have been subsequently confirmed. 
In Ansted’s Channel Islands, second edition (1865), p. 187, we 
have a carefully prepared and reliable list drawn up by a lady who 
had devoted much study to the lichens, Mrs. Collings, the wife of the 
then Seigneur of Sark. About 150 species are enumerated, besides 
many named varieties, the nomenclature of Mudd’s Manual of 
British Lichens being followed throughout. Further records are 
found in Leighton’s Lichen Flora of Great Britain, Ireland, and 
the Channel Islands, third edition (1879), where nearly 180 species 
are noted for Guernsey, chiefly on the authority of two distinguished 
lichenologists, the Rev. Thomas Salwey, of Oswestry, who died in 
1878, and Mr. Charles Larbalestier, of Jersey. 
None of these lists furnish any information as to the comparative 
frequency or rarity of the different species: and it was with the 
object of supplying this deficiency that I contributed ta the 
Transactions of the Guernsey Society of Natural Science for 1892 a 
paper summarising my own work at the lichens, and recording 243 
species with localities and notes on distribution. Some further 
additions are taken from the records given in Crombie’s Monograph 
of British Lichens (1894), only one volume of which has yet been 
published. Specimens of these are in the herbarium of the British 
Museum. 
In the following pages the names and arrangement accord with 
Leighton’s Lichen Flora, and I am responsible for all particulars of 
distribution and locality, except where otherwise stated. The 
number of lichens now recorded for Guernsey amounts to 309 
species, without counting named varieties and forms. 
