LICHENS 
113 
Ocean. Tuckerman records it as having been collected in Arctic 
America (on mosses) by Wright. Th. Fries, in Lichenes Arctoi, 
states that it is common in Scandinavia, Spitzbergen, and Greenland. 
The specimen from Kukak Bay is on bark, with Bucllia parasema 
and a Physcia. The specimen from Kadiak has immature spores and 
is doubtfully referred here. On the same piece of wood are three 
different species of Cetraria and three of Parmelia. 
126. Placodium aurantiacum (Lightf.) Naeg. & Hepp. 
Lichen aurantiacus Lightfoot, FI. Scot. 2: 810. 1777. 
Placodium aura?itiacum Naegeli & Hepp, Sporen der Flechten Europas. 1853. 
St. Lawrence Island (Trelease, S53). On dead w'ood. New to 
Alaska. 
This species was collected in Arctic America by Richardson. 
127. Placodium murorum (Hoffm.) DC. 
Lichen murorum Hoffmann, Enum. 63. t. g. f. 2. 1784. 
Placodiiwi murorum De Candolle, FI. Fr. 2: 378. 1805. 
Virgin Bay, Prince William Sound (Trelease, 978 in part) ; Ka¬ 
diak (Trelease, 982, on slate rock). New to Alaska. Collected by 
Richardson in Arctic America. 
With no. 978 is a specimen of Lecanora subfusca coilocarpa. 
128. Placodium elegans (Link) DC. 
Lichen elegans Link, Ann. 1 : 37. 1791. 
Placodium elegans De Candolle, FI. Fr. 2 : 379. n. 1026. 1805. —Sowerby, 
Eng. Bot. t. 2181. 
Alaska (Funston, 24) ; White Pass, 900 ft. (Trelease, 980) ; Van¬ 
couver Island, Broughton Strait (Trelease, 985 in part) ; Unalaska 
(Setchell) ; St. Michael (Setchell). Collected by Wright on the 
islands of Bering Strait, by Dr. Bean on Chamisso Island, at Elephant 
Point, in Eschscholtz Bay, and on Chernofski Island, and by Macoun 
on St. Paul Island. This lichen has been reported from various points 
in Arctic America, and it seems to be common through all the moun¬ 
tainous and northern regions of America, from the Atlantic to the 
Pacific. 
No. 9S5 has with it a lichen which is apparently a sterile Lecidea. 
129. Placodium coralloides ? Tuck. 
Placodium coralloides Tuckerman, Syn. N. A. L. 1 : 169. 1882. 
St. Paul Island (Trelease, 1000). On the earth. 
A very interesting specimen which may possibly be referred here. 
Unfortunately it is not fruited, and therefore its classification is uncer- 
