Part 21

Fig. 10. Scale of Araucarites Brodiei, Carr. From the Great Oolite at Stonesfield.

Fig. 11. Scale of Araucarites Phillipsii, Carr. From the Oolite of Yorkshire.

All the figures on this Plate (except Fig. 2, which is one-half of the natural size) are drawn the size of nature.

PLATE III.

Fig. 1. Mass of coal from Fordel, Fifeshire, containing numerous sporangia of Flemingites. These sporangia occur in coal from different localities in England and Scotland. Binney has seen them in Wigan coal. Huxley has found them abounding in coal near Bradford (Balfour, R.S.E. Trans.)

Fig. 2. One of the Sporangia entire, and separated from the coal (Balfour).

Fig. 3. Sporangium with its valves separated, containing a quantity of black carbonaceous matter in its interior (Balfour). This matter is formed by the altered spores (microspores).

Fig. 4. Sporangium, showing the triradiate marking on the under surface, and a granulation produced probably by the spores in the interior.

Fig. 5. Punctated woody tissue (Coniferous). From the needle coal of Toplitz, Bohemia (Harkness).

Fig. 6. Scalariform vessels from coal (Balfour).

Fig. 7. Stigmaria, with markings of rootlets. One showing the papilla to which the rootlet was articulated (Hooker).

Fig. 8. Transverse section of Stigmaria, showing the vascular cylinder divided into wedges (Hooker).

Fig. 9. Tissues of Stigmaria, showing the inner portion of the vascular cylinder (Hooker).

Fig. 10. Transverse section of a Lepidostrobus, the fructification of Lepidodendron, showing scales and sporangia (Hooker).

Fig. 11. Ulodendron Taylori (Carruthers).

PLATE IV.

Fig. 1. Sigillaria Brownii, restored (Dawson).

Fig. 2. Sigillaria elegans, restored (Dawson).

Fig. 3. Lepidodendron, restored (Carruthers, Bot. Soc. Trans.)

Fig. 4. Calamites, restored (Carruthers, Bot. Soc. Trans.)

Fig. 5. Psilophyton, a fossil of the Devonian epoch (Dawson).

A. T. Hollick del. et lith. Mintern Bros. imp.

Fossil Ferns.]

A. T. Hollick del. et lith. Mintern Bros. imp.

Fossil Gymnospermous Fruits.]

M^cFarlane & Erskine, Lith^{rs} Edin^r

Coal and Coal-Plants.]

M^cFarlane & Erskine, Lith^{rs} Edin^r