LICHENES ARCTICI. 249 
growing among sticks, grasses, and Polytricha. The yellowish 
colour is probably accidental: the less exposed parts of the 
thallus incline to glaucous. 
Nephroma polaris, 4ch. Barren; growing among Hypna and Dicranum 
scoparium : the leaves of grasses and a Betula (B. nana?) being 
intermixed. The thallus agrees with European and North 
American specimens. I suspect that the Antarctic plant 
(Hook. fil.! Crypt. Ant. p. 218) is not the same. 
Peltidea aphthosa, 4ch. Fertile, mixed with Hypna, Sphagna, &c. 
horizontalis, Ach. Mixed with leaves of Betula nana, Dryas 
octopetala, mosses, &c. The apothecia incline to be revolute ; 
but there is little doubt that the plant belongs to this species. 
canina, d4ch. Fertile, among Hypna, Vaccinia, and grasses. 
venosa, 4ch. On earth, fertile. 
Sticta pulmonacea, 4ch. Barren; among various Hypna and the 
leaves of a tree (a Salix apparently). Specimens rather small, 
neatly crisped, pale ferruginous below. 
Parmelia saxatilis, 4ch., Tayl.! On rocks; barren. 
-—— parietina, 4ch. Particles of this species are scattered over spe- 
cimens of the preceding. 
—— pallescens v. Upsaliensis, Fries (P. Upsaliensis, Auct.). On roots 
of some coarse grass. 
—— tartarea £ frigida, Fries. Covering the surface of a moss (Dicra- 
num), which it has destroyed. i cabra 
——— oculata? Fries, E. Bot. t. 1833. Barren; but agreeing very well 
with the figure cited ; spreading over Polytricha, &c. 
Cladonia uncialis, Fries. Specimens very fine, though barren, four or - 
five inches long, of a yellower colour than is usual in European 
specimens : they are much perforated above and near the gaping 
axils. The description of C. Boryi var. lacunosa, Tuckerm. 
(Enum. of North. Lich. p. 54) agrees tolerably well: I should 
suppose, however, that these specimens belong to C. uncialis : 
they are mixed with C. rangiferina and two species of Betula. 
——— rangiferina, Hoffm. 
— digitata? Hoffm. Barren. 
—— deformis, Hoffm. On rotten fir-wood; cups proliferous ; apo- 
thecia symphycarpous. 
ies Posen iris Fries (C. extensa, Flórke). Very fine, 
