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barns, and stables, which seem to have a speciai attraction for it, 
though it by no means exclusively confines its presence to such 
edifices, but may be found generally distributed in lowland districts. 
It is one of the Lichens, too, that seems to like a seaside residence, 
and maritime rocks are frequently brightened by its gay circles. 
Other common species of similar shape, but differing in colour 
and in the internal structure of the apothecia, are members of the 
genus Parmelia. Everywhere we meet with the crispy-looking 
P. saxitilis, which does not restrict itself to stones, as it should do 
if it acted up to its name. Then there is the pale greenish-yellow 
P. conspersa, the lobes of whose thallus are so frequently sprinkled 
with black dots, which indicate in this species the second and 
complementary reproductive organ. 
The brown circles of P. fuliginosa, a great part of whose upper 
surface is covered with a soft-looking growth resembling the pile 
of velvet, are also extremely abundant. I always regard this plant 
with a feeling akin to gratitude, as it was through it I first made 
the acquaintance of Dr. Nylander, the man most versed in lichen- 
lore of this or any other time, whose kind assistance and advice 
have been so freely given to me for almost twenty years. 
The Peltigere are large, coarse-looking, somewhat leathery plants, 
creeping over moss and rock, and bearing their shield-like apothecia 
on marginal lobes, which they often erect like fingers. One of 
them, Pe/tigera canina, was at one time thought serviceable in cases 
of hydrophobia; and another, Peltidea aphthosa, a bright apple. 
green plant with brown warts, was held to be a specific in the 
infantile disorder called “the thrush.” Needless to say they are 
neither used at the present day. 
I shall only mention one more, ZLobaria pulmonacea, which can 
be found in this neighbourhood on trees. Its thallus is lobed in a 
Strikingly divergent manner, and the upper surface is marked by 
numerous depressions, the elevations between which give it a 
peculiar reticulated appearance. In those times when plants were 
believed to carry in their form and appearance a key to their 
medical properties, the “lung of the oak,” as it was called, was 
supposed of great efficacy in diseases of the chest. ‘The tribe to 
