72 MR. W. WEST: ECOLOGICAL NOTES. 
Trees near Corrie (see p. 71). 
The following also occurred in smaller quantity on the trees :— 
Zygodon conoideus, Plagiochila | punctata, Cladonia fimbriata, Pertusaria 
faginea, on Alders ; Orthotrichum Lyellii on Sycamores; Arthropyrenia 
epidermidis on Rowans ; Acrocordia biformis, Weissia ulophylla, Opegrapha 
herpetica, О. varia, оп Hazels ; Evernia Prunastri and Weissia ulophylla on 
Birches. 
Average approximate percentages of the three chief epiphytes of the above 
15 lots :—Stereodon cupressiformis 84, Parmelia saxatilis 152, Parmelia fuli- 
ginosa var. lætevirens 91. 
The relative percentages of trees in a small mixed wood near Corrie were :— 
Hazel 41, Birch 31, Ash 20, Rowan 4, Oak 2, Hawthorn 2. Alders only 
occurred in the lowest and flattest part, where they were preponderant. 
Near Brodick, Lower Glen Rosa (see p. 73). 
A few other species occurred in small quantity, such as Cladonia fimbriata 
var. tubæformis, C. fibula, Pertusaria leioplaca, Usnea ceratina, Parmelia 
levigata, Hylocomium brevirostre, and Weissia ulophylla. 
Average approximate percentages of the four chief epiphytes of the above 
9 lots :—Stereodon cupressiformis 21, Parmelia saxatilis 181, P. physodes 5, 
P. perlata 5. 
In a Larch wood, Parmelia physodes (about 40) was almost the only 
epiphyte, dwarf bits оЁ Usnea occurred with it ; they were chiefly on the 
windward side. There was a little Platysma glaucum on some of them, and 
scattered Alectoria jubata on others. Near the base of a few was Cladonia 
squamosa ; Parmelia saxatilis and Stereodon cupressiformis were almost 
absent, and Jsothecium myosuroides was quite absent. Wherever the 
branches were dead, they were covered with Parmelia physodes. 
Some Oaks off the head of Holy Loch, Argyll (average rainfall 81 inches, 
average rainy days 222), on a slope about 8 metres from a rill, were 
practically covered with the following, the first being decidedly dominant : 
Stereodon cupressiformis var. filiformis (55), Dicranum scoparium (6), Pla- 
tysma glaucum (10), Evernia Prunastri (8), Parmelia physodes (8), P. saxatilis 
(8), Cladonia pyxidata and fimbriata (3). Isothecium myosuroides, Orthotricha, 
and Ulote were absent on both these and the next. 
Other Oaks at a little distance in a more exposed situation : Stereodon 
cupressiformis var. filiformis (45) was again dominant, it was more abundant 
on the leeward side; the rest consisted of :—Parmelia sawatilis (15), P. phy- 
sodes (12), Pertusaria globulifera (10), Evernia Prunastri (6), Cladonia 
fimbriata and squamosa (2), with tufts of Dicranum scoparium and bits of 
Usnea. 
