262 
Mycologia 
cimens came to hand were marked “Lichen,” except “ No. 29” 
— labeled “Liverwort.” Spores 48X16//.. 
Lobaria peltigera (Del.) Wain. “Lichen No. 40, Clyde Valley, 
IV-27-96.” Spores 32-49 X 14-16 /t. Determined by Dr. 
Riddle. 
The Usneas of Jamaica present a very difficult problem be- 
cause of the mass of described species from tropical and sub- 
tropical regions, which have been named with little or no corre- 
lated study of distribution. The determinations here made are 
not considered necessarily final, but are the best elucidation pos- 
sible under the existing circumstances. Dr. J. A. Cushman of the 
Boston Society of Natural History has kindly allowed me to study, 
and here record, notes on the Usneas of a collection recently made 
by him in Jamaica. All his collecting was done in a different 
region of the island from that covered by Miss Cummings and 
Dr. Johnson, and his specimens seem to represent a flora less 
typically tropical. 
Dr. Riddle writes me in connection with his determinations : “ I 
was not at all satisfied with my dispositon ” of the Usneas. We 
have since gone over all the material together, and there is very 
little doubt, as I have said, that the members of this genus from 
the tropics need a thorough revision. 
Usnea [ Eumitria ] implicata Strt. “ Lichen No. 24,” and “ 25 
Cinchona Hill, IV-28-03.” Two small fertile specimens — 
spores normal. Also “ Lichen No. 28, Sir John, V-1-96,” 
sterile. Dr. Cushman’s material from Newcastle and Mande- 
ville represents this species in part. It is clearly defined by its 
hollow or arachnoid axis. Superficially it suggests U. florida 
(L.) Web. 
Usnea dasypogoides var. cladoblephara Mull. Arg. “Lichen No. 
26, John Crow, I V-i 8-93,” and “Lichen No. 28, Sir John, V- 
1-96.” This material appears to belong here. The type of this 
variety however, is not to be found among the Muller types 
either at Chambesy or at Kew. 
The material No. lb determined by Dr. Riddle as Usnea laevis 
(Eschw.) Nyl. is undoubtedly U. arthroclada Fee., which appears 
to be quite synonymous with U. intercalaris Wain, non? Kremp., 
U . laevigata Wain., and seemingly even U. articulata var. di- 
