^{page 307 note *} Perhaps certain beds in Fife may form an exception to this general statement, but that district requires further investigation.

^{page 309 note *} I am indebted to Mr A. Sinclair for this section.

^{page 310 note *} Publications of the Geological Survey of Scotland relating to the Galston, Kilmarnock,, and Kilwinning Coal Fields:—Geological Map, sheet 22. Memoirs. Ayrshire (north part), with parts of Renfrewshire and Lanarkshire. Explanation of sheet 22, 1872. Horizontal Sections, sheet 5. Vertical Sections, sheet 3.

^{page 310 note †} This is about 18 feet above the Durroch Coal.

^{page 311 note *} Haidinger's Naturwissensch., vol. iv. Abth. i., 1851, p. 68Google Scholar, pl. viii. fig. 1

^{page 312 note *} Sitzungsb. der k. Akad. der Wiss., 1 Abth. vol. lxxxiii., 1881, p. 416Google Scholar, pl i. fig. 1.

^{page 312 note †} Fossil Flora, vol. ii. pl. ccxvi.

^{page 312 note ‡} See Trans. Roy. Soc. Edin., vol. xxxiii. p. 340, fig. 1.

^{page 312 note §} Antediluvian Phytology, pl. iv.

^{page 318 note *} Coal Flora, vol. iii. p. 725, pl. xcii. figs. 8, 8a.

^{page 318 note †} Ibid., vol. i. p. 50; vol. iii. p. 725, pl. xcii. figs. 7, 7a.

^{page 319 note *} Steinkohlen Calamarien, vol. ii. p. 196, pl. xix. fig. 4.

^{page 326 note *} Loc. cit., pl. xvii.

^{page 326 note †} Flore Carb. d. Départ. de la Loire, p. 113.

^{page 329 note *} Coal Flora, vol. i. p. 81, pl. v. figs. 1–6. Geol. Rept. of Ilin., vol. ii. p. 430; ibid., vol. iv. p. 384, pl. vi. fig. 4.

^{page 329 note *} Flora foss. Helv., p. 17, pl. vi. fig. 7.

^{page 330 note *} Flora foss. d. bassin houil. d. Valenciennes, p. 284.

^{page 333 note *} Cours d. botan. foss., vol. ii., 1882, p. 102Google Scholar.

^{page 333 note †} Consult further, Zeiller, “Sur la constitution des épis de fructification du Sphenophyllum cuneifolium,” Comptcs Rendus, 11th July 1892, which has appeared since this paper was written.

^{page 334 note *} Die Carbon. Flora d. Schatzlarer Schichten, Abth. ii.; “Die Calamarien cler Carbon Flora,” Abhandl. d. k. k. geol. Reichsanstalt, Band xi. Abth. ii. p. 191, pl. xi. fig. 2.

^{page 334 note †} Mem. and Proc. Manchester Lit. and Phil. Soc., Session 1889–90, vol. iii. series 4.

^{page 334 note ‡} See Kidston, “On the Fructification of Sphenophyllum trichomatosum, Stur, from the Yorkshire Coal Field,” Proc. Roy. Phys. Soc. Edin., vol. xi. p. 56, pl. i., 1892Google Scholar.

^{page 335 note *} For fuller notes on this species, see Kidston, , Proc. Roy. Phys. Soc., vol. x., 1889–1890, p. 350Google Scholar.

^{page 341 note *} Page 14.

^{page 341 note †} December 10, 1890.

^{page 343 note *} Calciferous Sandstone Series.

^{page 345 note *} Zeiller, , Bull. Soc. Géol. d. France, 3_e sér., vol. xiv. p. 168Google Scholar.

^{page 347 note *} Hist. d. végét. foss., p. 452, pl. cl. fig. 1.

^{page 347 note †} Coal Flora, vol. ii. p. 495, pl. lxxi. figs. 7, 8.

^{page 348 note *} Favularia tessellata, L. and H., Fossil Flora, vol. i. pls. lxxxiii.–lxxxv., are too imperfect to refer with certainty to this species, and although it is almost certain that Brongniart was correct in identifying his specimens as the Phytolithus tessellatus, Steinhauer (Trans. Amer. Phil. Soc., vol. i. p. 295, pl. vii. fig. 2), Brongniart must be regarded as the founder of the species if we wish to clear ourselves of all doubt as to the true characters of the plant.

^{page 349 note *} See Proc. Roy. Phys. Soc., vol. ix. pp. 82–117, pls. iii.–vi., and Trans. Roy. Soc. Edin., vol. xxxv. pp. 86–94.

^{page 349 note †} These numbers refer to the list of localities from which these small fossils have been obtained, irrespective of district.

^{page 351 note *} Flore Carbon. d. Départ, de la Loire, &c, pp. 208, 214, 222, 1877.

^{page 351 note †} Comptes Rendus, March 23, 1885.

^{page 352 note *} See Grand' Eury, Flore Carbon. d. Départ. de la Loire, p. 261, and Kidston, , Proc. Roy. Phys. Soc. Edin., vol. x. p. 248, 1891Google Scholar.

^{page 353 note *} See Geinitz, loc. cit., pl. xxi. fig. 2b.

^{page 354 note *} Since the above was written, I have seen a few specimens of Carpolithus Cordai from Yorkshire.

^{page 355 note *} See Carruthers, Geol. Mag., loc cit.

^{page 357 note *} See Kidston, Trans. York. Nat. Union, part xiv., 1890, p. 9.