MICROPALÆONTOLOGY OF POSTGLACIAL DEPOSITS. 473 
invade the old water-logged cuttings, in the end forming new peat. In the 
neighbourhood of moss No. 14 five stages of succession were seen :— 
1. Menyanthes. 
2. Menyanthes, Sphagnum. 
3. Menyanthes, Sphagnum, Juncus supinus, Eriophorum polystachion, 
Scirpus uniglumis. 
4. Calluna, Sphagnum, Erica Tetralia, Drosera rotundifolia, Potentilla 
Tormentilla, Molinia cærulea. 
5. Calluna-lèhacomitrium heath. 
-Prar Moss No. 15. (Text-fig. 12.) 
A boring was made at the south-east margin of a tarn S.W. of Stornoway, 
immediately east of the Stornoway-Loch Chlathamir—Crossbost road and 
N.N.W. of the point where this road crosses Allt na Craoibhe. No 
'TàxT-FIG. 12. 
30 40 50 60 70 80% 
| | | 
14 > ; 
| / | 
| "M 
—g-— Alnus. —o— Betula. —e— Pinus. NNNM Ulmus. 
——— Quercus. —-------- Tilia. --m-- Corylus. 
phanerogamous plants grew in the loch, though fossil Vymphea pollen was 
found. The margin of the loch was bordered by widespread Calluneta with 
Drosera rotundifolia, Erica Tetralix, Eriophorum vaginatum, Potentilla 
Tormentilla, Scirpus cespitosus, Rhacomitrium lanuginosum, ete. 
The thickness of the peat was 210 em. It consisted to a great extent 
of much decayed Sphagnum peat with some thin layers of wetter peat 
(resembling Carex peat; 120 em. beneath the surface a seed of Menyanthes 
was found). The level of the loch was 135 em. lower than the point where 
the boring was taken, The pollen-spectrum of the lowest sample (No. 4) is 
that of the A-zone or a stratum somewhat younger than it. 
