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EXPLANATION OF PLATES. 
PLATE I. 
Figs. 1 and 2.—Macrospores from the Shallow Seam of Cannock 
Chase, x 22 diam. 
Fig. 3.—Microspores from the Shallow Seam of Cannock Chase, 
x 262 diam. 
Fig. 4.—Spores of Plants from about the centre of the lower 
bed of the Welsh Four Feet Seam, x 262 diam. 
Fig. 5.—Horizontal section of the same from the top of the 
coal close under the “ parting,” x 124 diam. 
Fig. 6.—Scalariform Tissue from the same, x 160 diam. 
Fig. 7.—Macrospores from uppermost three inches of the Better 
Bed Seam, x 22 diam. 
Fig. 8.—Microspores from the same, x 262 diam. 
Fig. 9.—Transverse section of the same two inches from the 
roof of the seam, x 12} diam. Shows the macrospores, 
the spaces between them are occupied by microspores and 
other vegetable material. 
Fig. 10.—Horizontal section of the same, x 12} diam. 
Fig. 11.—Horizontal section of the same ten inches from the 
roof. Shows one macrospore, carbonized vegetable tissue 
and hydrocarbon, x 124 diam. 
PLATE II. 
Fig. 12.—Horizontal section of the Better Bed Seam, four 
inches from the roof, x 124 diam. 
Fig. 13.—Macrospores and microspores from Fig. 12, x 50 diam. 
Figs. 14, 15, 16.—Macrospores from the lowest bed of the Splint 
Coal from Whitehill Colliery, near Edinburgh, x 22 diam. 
Fig. 17.—Microspores from the same, x 262 diam. 
Fig. 18.—Horizontal section of the above coal, x 124 diam. 
Fig. 19.—Other macrospores and microspores from the same, 
x 262 diam. 
Fig. 20.—A space between macrospores in Fig. 18, x 160 diam. 
