268 Proceedings of the Royal Physical Society. 
EXPLANATION OF PLATES. 
Plate IV. 
Fig. 1. Sphenopteris Dunsit, Kidston. 
Locality.—Burdiehouse, near Edinburgh. 
Horizon.—Calciferous Sandstone Series (Reg. No. 649). 
Fig. 2. Sphenopteris Dunsii, Kidston. 
Locality.—Colinton, Midlothian. 
Horizon.—Calciferous Sandstone Series (Reg. No. 650). 
Figs. 3,4. Pinnules from specimen shown at Fig. 2; x8. 
Plate V. 
g. 1. Plumatopteris elegans, Kidston. 
Locatlity.—East Kilbride, Lanarkshire. 
Horizon.—Carboniferous Limestone Series (Reg. No. 791). 
Fig. la. Portion of Fig. 1, slightly enlarged. . 
Fig. 2. Rhacopteris subcuneata, Kidston. 
Locality.—Lewis Burn, North Tynedale, Northumberland. 
Horizon.—Calciferous Sandstone Series. 
Specimen in the Collection of the Geological Survey of England. 
Figs. 3-5, Cardiocarpus nervosus, Kidston. 
Locality.—Horncliffe Dean, river Tweed, Northumberland. 
Horizon.—Calciferous Sandstone Series. 
Specimens in the Collection of the Geological Survey of England. 
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Plate VI. 
Fig. 1. Rhacopteris subcuneata, Kidston. 
Locality.—Lewis Burn, North Tynedale, Northumberland. 
Horizon.—Calciferous Sandstone Series, 
Specimen in the Collection of the Geological Survey of England. 
Fig. 2. Sigillaria Youngiana, Kidston. 
Locality.—Robroystone, Lanarkshire. 
Horizon.—Carboniferous Limestone Series. 
Specimen in the Hunterian Museum, University of Glasgow. 
Fig. 2a. Leaf-scar, enlarged. 
Figs. 3,4. Cardiocarpus bicaudatus, Kidston. 
Locality.—Long Craig Bay, 14 mile west of Dunbar, Hadding- 
tonshire. 
Horizon.—Calciferous Sandstone Series (Reg. Nos. 1940 and 
1941). 
My thanks are due to Sir Archibald Geikie for permission 
to describe the specimens belonging to the Geological Survey 
Collection. 
The specimens distinguished by Registration numbers are 
in the author’s collection. 
