156 RmpLE: THe LICHENS oF BERMUDA 
58. LEPTOGIUM TENUISsIMUM (Dicks.) Koerb. 
On the ground, Paynter’s Vale, Brown & Britton 9709. 
One would scarcely expect this northern species in Bermuda, 
and the material being sterile the determination is not certain, 
but the thalline characters agree with this species. 
59. LEPTOGIUM TREMELLOIDES (L. f.) S. F. Gray. 
Including L. diaphanum (Sw.) Ach. of Crombie’s Report. 
There are two recognizable phases of the species in Bermuda, 
although these are not distinct enough to receive names. The 
following specimens have abundant apothecia and few lobules: 
on Juniperus, Devonshire Marsh, E. G. B. 39; on Elaeodendron, 
$47, and on Conocarpus, Castle Harbor, Brown & Britton 840. 
The remaining specimens are sparingly fruited and have the 
lobes more or less densely fringed with lobules: on various trees, 
Walsingham, M. A. Howe; Castle Harbor, 846, 848; Hall’s Island, 
886, and Paynter's Vale, Brown & Britton 992; St. David's Island, 
Brown, Britton & Bisset, 2079. Also collected by the Challenger 
Expedition. 
60. PERTUSARIA LEIOPLACA (Ach.) Schaer. 
P. papillata (Ach.) Nyl. of Crombie’s Report. 
On orange, Paynter’s Vale, E. G. B. 364; without definite 
station, W. G. Farlow; also Challenger Expedition. 
61. PERTUSARIA LUTESCENS (Eschw.) Krempelh. Lichenen-Flora 
der Siidsee-Inseln, Jour. Mus. Godeffroy 1: 104. Hamburg. 
1873. 
Pertusaria communis var. lutescens Eschw.; Martius, Flor. Bras. 
Te 318., 164% 5 
A complete description of the species based on several speci- 
mens, including the type, was given in Mueller-Argau’s Revisio 
Lichenum Eschweilerianum, Flora 67:672. 1884. 
On tamarisk, Biological Station, E. G. B. 36 in part; and on 
Melia, hillside near Flatts, E. G. B. BS, 2 
There has been no authentic specimen of this species for com- 
parison but the material agrees well with Mueller-Argau’s de- 
scription cited above. The species is recorded from Rio Janeiro 
