486 MR, G. ERDTMAN : STUDIES IN THE 
D. 95 em. Carex peat, H 7-8, with Menyanthes and large Æquisetum 
rhizomes ; in places also twigs and rubble swept down by floods and 
embedded in the peat. The 5 em. at the bottom resembles a dark 
clay. 
C. Rock. 
Analyses :— 
10 em. below the surface: 1 Alnus ; 1 Ericaceæ tetrad. 
Dem. 4, y 9 Ericaceæ tetrads. 
710 cm. ,, " " Ericacex tetrads. 
100 cm. ,, » » 1 Alnus, 3 Betula, 1 Pinus, 1 Quercus. 
150 em. below the surface: 1 Alnus, 7 Betula, 17 “ Salix”; Ericacex 
tetrads common. 
200 em. below the surface: 2 Alnus, 13 Betula (52 per cent.), 45 Pinus 
(18 per cent.), 5°5 Quercus; 3 “Salix.” In this sample occurred 
many rootlets, probably of Carew limosa (cf. Matjuschenko, 1923, 
fig, 1). 
Prat Moss No, 31. 
A smooth, wet meadow with Hydrocotyle, Juncus squarrosus, Montia, ete., 
about 150 m. W. of the N.W. point of Lunga Water. It is drained by a 
curious channel, 60 em. broad and 120 em. deep, completely filled by water, 
in which Myriophyllum alterniflorum and Potamogeton polygonifolius grow. 
It was impossible to distinguish different layers, the whole deposit (200 cm.) 
being of a dy-like character. It rested on a rock-bottom. 
Analyses :— 
45 cm. below the surface: 1 Alnus, 10 Betula; 4 cf. Sali. 
95cm. ,, » » 1 Acer, 3 Alnus (11 per cent.), 18 Betula (69 
per cent.), 1 Zle, 2 Quercus, 1 Tilia; 2 Corylus; 6 cf. Salix. 
145 em. below the surface: 3 Alnus, 10 Betula (50 per cent.), 7 Pinus; 
2 Corylus ; 24 Polypodium vulgare spores. 
195 em. below the surface: 1 Betula, 15 Pinus, 1 Quercus; 24 cf. Saliw ; 
1 Polypodium spore. 
Prat Moss No. 32. 
A section situated 20 m. S.W. of the Sandness road at the east point of 
Lunga Water and 6 m. above the level of this loch (about 44 m. above sea- 
level). Probably it is the same section as that described by Lewis (iv. 
1911, pp. 796-797). 
Stratification (163 cm.) :— 
A. 15 em. Calluna peat. 
