146 RippLE: THE LICHENS OF BERMUDA 
Between 1905 and 1914 a more complete exploration of the 
flora of Bermuda has been carried on by Dr. and Mrs. N. L. Brit- 
ton, Dr. F. J. Seaver, and Messrs. Stewardson Brown and Paul 
Bisset, resulting in the finding of sixty-five species and varieties, 
of which fifty, including three new species, had not been previ- 
ously reported. 
As a result of these several collections, we now have a total of 
thirty-six genera, with eighty-six species and varieties of lichens, 
known to occur in Bermuda. Ten of these species are endemic. 
The collection made by the members of the staff of the New 
York Botanical Garden, in codperation with the Academy of 
Natural Sciences of Philadelphia, has formed the chief basis of 
the following enumeration. All numbers cited refer to these 
specimens. Since Mrs. Elizabeth G. Britton has collected more 
numbers than anyone else, the initials only are cited. The names 
of other collectors are given in full. References are also given to 
the species collected by Professor Farlow, and to the records of 
the Challenger Expedition. 
1. VERRUCARIA RUPESTRIS Schrad. 
On rocks, without definite station, W. G. Farlow. 
2. VERRUCARIA RUPESTRIS var. RUDERUM DC. 
Verrucaria ruderella Nyl.; Crombie, Jour. Linn. Soc. Bot. 
16: 27. 1877. 
On rocks, without definite station, C hallenger Expedition. 
3. Thelidium bermudanum (Tuck.) Riddle, comb. nov. 
Verrucaria bermudana Tuck.; Nylander, Sert. Lich. trop. 
Labuan et Singapore 43. 1891. 
As the original description is not readily accessible, it is given 
here: ‘‘Thallus vix ullus; apothecia pyrenio dimidiato-nigro 
(latit. circ. 0.25 mm.) convexa; sporae 8nae breviter fusiformes 
I-septatae, long. 0.011—-12, cr. 0.0035-45 mm., in thecis angustis; 
paraphyses graciles. Super saxa calcarea in Ins. Bermudis. 
Affinis V. albido-atrae Nyl.”” South shore; type collected by Pro- 
fessor W. G. Farlow. This species and the next are strictly 
maritime, growing just at tide-limit. 
