106 TRANSACTIONS AND PROCEEDINGS OF THE [Szss, xx. 
Lecidea fusco-atra (L.), Th. Fr.—Oceurs in the Arctic 
regions. South Orkneys. 
Ehizocarpon geographicum (L.), D.C.—Found on rocks in 
Scotia Bay, South Orkneys. It is a cosmopolitan species, 
being frequently met with in the Arctic regions, and it may 
also be described as being a typical Alpine plant. 
Gyrophora vellea (L.), Ach, (or vellerea (L.), Ach., according 
to Arnold) was collected on rocks on the south-west shore of 
Scotia Bay rising to a height of 1000 feet. It was also 
collected on Saddle Island at a height of 300 feet. The 
specimens were all well developed, one measuring as much as 
11 by 20cm. The latter was found growing in close associa- 
tion with Usnea melaxantha, Ach., some plants of which 
were actually tirmly attached to the surface of the Gyrophora 
plant. Gyrophora vellea is recorded from America and 
Europe, being an Arctic and Alpine plant. 
Cladonia jimbriata (L.) Fr.—This species, though otherwise 
cosmopolitan in distribution, does not occur in the extreme 
Arctic regions, and its discovery in the South Orkneys, where 
it was found between moss in Scotia Bay, is of great interest. 
Cladonia deformis (Ach.) Hffm.—A few specimens of a 
Cladonia brought from Scotia Bay, South Orkneys, seem to 
belong to this species. It is again cosmopolitan, being also 
a typical Arctic and Alpine plant. 
Usnea melaxantha, Ach., is common both in the Arctic 
and Antarctic regions of America and Europe, and also in 
New Zealand and the Andes. A number of species appear 
to be nearly related to this plant, but they are not all quite 
clearly defined. I am referring to U. Yaylori (Hook.); 
U. Hieronymi, Krphbr.; U. trachycarpa, Mill.-Arg. ; and even 
U. sulphurea, Konig, which is probably only a synonym of 
U. melaxantha, Ach. Some of the specimens were found 
growing on and firmly attached to Gyrophora vellea. 
Lryopogon jubatum, Link.—Cosmopolitan, Arctic, and typi- 
cally Alpine. Small plants were found in between specimens 
of Usnea melaxantha from the South Orkneys. 
Rinodina turfacea (Wahlenb.) Fr.— Europe, Asia and 
America, Alpine and Arctic. The material collected from a 
rock on the South Orkneys must, I think, be ineluded in 
this species. It has a remarkably well developed, thick 
thallus, but this may be due to its unusual habitat on rocks. 
