The Lichens of Bermuda 
LINCOLN W. RIDDLE 
Our knowledge of the lichens of Bermuda up to the present 
time has been confined to the Reports of the Challenger Expedi- 
tion, based on the collections made by H. N. Moseley, who secured 
in Bermuda only twenty-five species and varieties of lichens. 
Three successive reports on the lichens of the Challenger Expedi- 
tion were published. The first was that of Stirton in the Journal 
of the Linnaean Society for 1875 (14: 369-372). Two years 
later Crombie, with the assistance of Nylander, went over the 
collection, revised many of Stirton’s determinations, and pub- 
lished a report in the journal cited (16: 214-217). This report 
included several ‘‘new species and varieties” named by Nylander, 
but, with one exception noted below, these differed from well- 
known species in chemical tests only or in such trivial characters 
that they cannot be considered valid. Finally, in 1885, in the 
official Report on the Scientific Results of the Voyage of H. M.S. 
Challenger, Botany, vol. 1, No. 2, Part 1, Hemsley published the 
list again, his list being practically a reprint of that of Crombie. 
Meanwhile, in 1880 and in 1881, Professor W. G. Farlow, of 
Harvard University, had visited Bermuda and made a small but 
important collection of lichens. This was turned over to Tucker- 
man, who named twenty-one species, of which six were new. 
Tuckerman was then busy with his Synopsis of the North American 
Lichens and was approaching the end of his life, so that he was 
unable to publish descriptions of the new species that he named. 
Duplicates of some of these specimens were sent to the Royal 
Herbarium at Kew, England, and Hemsley gave a list of thirteen of 
these in a footnote on page 99 of his report. Deser iptions of two 
of the new species, Gyalecta Farlowi and Verrucaria bermudana, 
were published by Nylander in 1890 and 1891, respectively, but 
the other new species from Professor Farlow’s collection have 
remained undescribed. He has very kindly allowed me to M- 
corporate the results of a study of his specimens in the present 
Paper. 
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