Page:Transactions of the Geological Society, 1st series, vol. 2.djvu/573

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In illustration of the Rev. W. Conybeare's paper, on a remarkable class of Organic Impressions occurring in Nodules of Flint, p. 328.

PLATE 15 to 26.

In illustration of Mr. William Phillips's paper on the Oxyd of Tin, p. 336.

Plate 15. Exhibits the practicable cleavages of the crystals of the oxyd of tin, leading to the determination that the primitive crystal is an obtuse octahedron, (Fig. 18.) p. 351. et seq.

Plate 16 to 23. Suite of crystalline forms, representing the existing crystals of this substance, with explanatory figures preceding the suite of each of the 12 modifications to which the primitive crystal is subject, p. 358. et seq.

Plate 24. Figures explanatory of the formation of simple and double macles, and shewing that they take place in the direction of the cleavages actually obtained and described by Pl. 15.—p. 366. et seq.

Plate 25. The crystalline forms of simple and double macles, p. 368. et seq.

Plate 26. The crystalline forms of macles of macles, shewing that they also take place in the direction of the cleavages, described by Pl. 15. p. 374.

PLATE 27 to 30.

In illustration of Mr. Webster's paper on Fossil Alcyonia, p. 377.

Plate 27, 28. Various appearances of the Tulip Alcyonium. The heads drawn in Pl. 28, are about half the size of the originals.

Plate 29. Fig. 12, 13. Various sections of the same fossil, p. 381.

Fig. 14, 15. Other species of Fossil Alcyonia. p. 386.

Plate 30. View of Western Lines on the south shore of the Isle of Wight, where the tulip alcyonium is best observed.

PLATE 31, 31†, and 32. Fig. 1

In illustration of Dr. Mac Culloch's paper, on the Geology of various Parts of Scotland, p. 388.

Plate 31. Fig. 1 & 2. Contortions in mica slate, at Loch Lomond, p. 438.