^{page 73 note *} Trans. Roy. Soc. Edin., vol. xxxv. p. 317.

^{page 73 note †} Trans. Roy. Soc. Edin., vol. xxxvi. p. 63.

^{page 73 note ‡} Memoirs of the Geological Survey, England and Wales: The Geology of the North Staffordshire Coal Fields, by Gibson, Walcot, B.SC, F.G.S., with contributions by G. Barrow, F.G.S., and C. B. Wedd, B.A., F.G.S.Google Scholar And a Palœontological Account, with list of Fossils, by Ward, John, F.G.S., 1905.Google Scholar

^{page 74 note *} Proc. Roy. Phys. Soc. Edin., vol. xii. p. 228, 1894.

^{page 74 note †} Quart. Journ. Geol. Soc., vol. lxi., 1905, pp. 308–321.

^{page 74 note ‡} Trans. of the Institute of Mining Engineers, vol. xlv. part i. pp. 30–48, 1913.

^{page 75 note *} Gibson, , Geol. of Coal and Coal Mining, Arnold's Geological Series, 1908, pp. 180–184Google Scholar. Vernon, , Quart. Journ. Geol. Soc., vol. lxviii., 1912, p. 613.Google ScholarKay, , Quart. Journ. Geol. Soc., vol. lxix. p. 433, 1913.CrossRefGoogle Scholar

^{page 75 note †} Wickham King, W., “The Uppermost Silurian and Old Red Sandstone of South Staffordshire,” Geol. Mag., dec. v., vol. ix. pp. 437–443, 484–491, 1912.CrossRefGoogle Scholar

^{page 75 note ‡} Memoir of the Geological Survey of Great Britain and of the Museum of Practical Geology: The South Staffordshire Coal Field, by Jukes, J. Beete, M.A. Camb., F.R.S., etc., 2nd ed., 1859, p. 20.Google Scholar

^{page 75 note §} These rocks are now included in the Staffordian Series, and include the Keele Group, the Newcastle-under-Lyme Group, and the Etruria Marls.

^{page 77 note *} Gibson, , The Geology of Coal and Coal Mining, Arnold's Geological Series, 1908, p. 184Google Scholar.

^{page 77 note †} Gibson, loc. cit., p. 149.

^{page 77 note ‡} Mem. Geol. Survey of Great Britain, vol. ii. part ii. p. 387, 1848.

^{page 77 note §} Geological Mag., dec. v., vol. ii. p. 208, 1905.

^{page 77 note ║} Palaeobotanische Zeitschrift, vol. i. part i., Nov. 1912, p. 46; text-figs. 1, 2.

^{page 77 note ¶} Trans. Roy. Soc. London, series B, vol. cxcvii. pp. 1–5, pl., 1904.

^{page 77 note **} Trans. Roy. Soc. London, series B, vol. cxcviii. pp. 413–445, pls. xxv.–xxviii., 1906.

^{page 78 note *} Loc. cit.

^{page 79 note *} “On the Fossil Plants of the Kilmarnock, Galston, and Kilwinning Coal Field,” p. 307, pls. i.–iv.

^{page 80 note *} The Sphenopteris dilatata Lesquereux in Owen, 2nd Rept. Geol. Reconnoissance of Arkansas, p. 310, pl. iii. fig. 3, 1860, is not Lindley and Hutton's species of that name.

^{page 81 note *} Catal. Palœoz. Plants, p. 72, 1886.

^{page 81 note †} Loc. cit.

^{page 81 note ‡} The specimens usually referred to Sphenopteris trifoliolata are, I believe, forms of Sphenopteris oblusiloba. For references see Kidston, , Mém. Musée roy. d'hist. nat. de Belgique, vol. iv. p. 10, 1911.Google Scholar

^{page 86 note *} Die Farne: Carbon-Flora Schatz. Schicht., p. 50, pl. xlii. figs. 1, 2.

^{page 86 note †} See Kidston, , Mém. Musée roy. d'hist. nat. de Belgique, vol. iv. pl. vi. fig. 1.Google Scholar

^{page 87 note *} Loc. cit., pl. i. fig. 15a.

^{page 87 note †} Stur included two species under his Hapalopteris Schatzlarensis in Die Farne d. Carbon-Flora d. Schatzlarer Schichten. p. 58. The genus Boweria is founded on specimens similar to Stur's pl. xl. fig. 1, which has been removed from Sphenopteris Schatzlarensis, so that Stur's specimen given on his pl. xl. fig. 1 can now be distinguished as Boweria Schatzlarensis. The original description of Boweria will be found in Kidston, Mém. Musée roy. d'hist. nat. de Belgique, vol. iv. p. 31, 1911.

^{page 88 note *} Über einige Carbonfarne aus der Familie der Sphenopteriden: Inaugural Dissertation, p. 37, 1908.

^{page 88 note †} Gothan, “Die Oberschlesische Steinkohlenflora. I. Theil: Farne und farnähnliche Gewächse,” p. 139, Abhandl. d. könig. preuss. geol. Landesanstalt, neue Folge, Heft 75, 1913.

^{page 88 note ‡} Farne d. Carbon-Flora d. Schatzlarer Schichten, p. 58, pl, xxxix. fig. 6, text-fig. 12a, b, 1885.

^{page 88 note §} Stur, Carbon-Flora d. Schatzlarer Schichten: Die Farne, p. 58, pl. xxxix. figs. 7, 7a; pl. xl. figs. 2–6 (not fig. 1, 1885).

^{page 90 note *} Behrend, , Über einige. Carbonfarne aus der Familie der Sphenopteriden: Inaugural Dissertation, 1908, p. 37Google Scholar. Also in Jahrb. d. k. preuss. geol. Landesanstalt, vol. xxix., I., Heft iii. p. 679; Gothan, , Oberschlesische Steinkohlenflora i. Theil, p. 139, 1913.Google Scholar

^{page 93 note *} Ann. of Bot., vol. xxii. p. 57, pl. vi. fig. 4.

^{page 93 note †} Loc. cit., figs. 3, 5, and 6.

^{page 93 note ‡} Nathorst, Palaeobot. Mitteilungen, No. 4; Kungl. Svenska Vetenskaps-Akad. Handl., Band xliii. No. 6, p. 10, pl. ii. tigs. 19–21.

^{page 94 note *} See Nathorst, l.c., p. 10; and Zeiller, , Gomptes rendus, vol. cxliv. p. 1139, 1907.Google Scholar

^{page 106 note *} Gutbier, Abdr. u. Verstein. D. Zwick. Schwarz, p. 68, pl. ix. figs. 8–11; see also Geinitz, l.c., p. 21, pl. xxvi. figs. 8, 9.

^{page 106 note †} Loc. cit.

^{page 106 note ‡} Flore carbon. du départ, de la Loire, p. 115, 1877. Zeiller, Flore foss. terr. houil. d. Commentry, p. 219, pl. xxiv. figs. 1, 3; pl. xxv. figs. 1, 2; pl. xxxi. fig. 1.

^{page 106 note §} Fortaine and White, Permian Flora, pp. 52 and 54, pl. x. figs. 1–3, 1880.

^{page 106 note ║} Phil. Trans., l.c., p. 1.

^{page 106 note ¶} These two specimens are figured in Kidston, Mém. Musée roy., l.c., text-figs. 8, 9.

^{page 108 note *} Potonié, l.c., p. 31.

^{page 109 note *} Flore foss. bassin houil. d. Valen., pl. xlii. fig. 1; well seen in fig 1a.

^{page 109 note †} Pl. xxii.

^{page 109 note ‡} Pl. iii.

^{page 110 note *} Loc. cit.

^{page 114 note *} Trans. Roy. Soc. Edin., vol. xxxiii. p. 150, pl. viii. fig. 7, 1887.

^{page 115 note *} “Flore foss. bassin houil. d'Héraclée,” p. 52, Mem. Soc. géol. d. France: Paléont. Mém., No. 21, 1899.

^{page 115 note †} Perm. Flora, p. 164, pl. xxiv. figs. 4–6, pl. xxv. figs. 1–4.

^{page 116 note *} See Pl. VI. figs. 7a, b, c.

^{page 119 note *} Geinitz, , “Die Calamarien der Steinkohlen-Formation u. d. Roethl. in Dresdener Museum,” Mitt, köngl. Miner.-Geol. u. Praehis. Museum im Dresden, Vierzehntes Heft, p. 12, pl. i. figs. 1, 2, 1898.Google Scholar

^{page 122 note *} Végét. foss. d. terr. houil. d. Belgique, pl. lxix. fig. 6, 1848.

^{page 123 note *} Foss. Plants, Upper Paleozoic, Kansas, p. 425, pl. liii. fig. 5, 1908.

^{page 125 note *} Steinkohlen Calamarien, Heft ii. p. 175, pl xxi. fig. 10.

^{page 130 note *} Kidston, , Mém. Musée roy. d'hist. nat. de Belgique, vol. iv. p. 221, pl. xiv. figs. 1–4, 4aGoogle Scholar; pl. xv. figs. 2, 3, 1911.

^{page 130 note †} Annalen d. k. k. naturhist. Hofmuseums, Wien, vol. xxvi. p. 449, pi. vi. and four text-figs., 1912.

^{page 131 note *} Lesquereux, Coal Flora, p. 328, pl. xlviii. fig. 9, 1879. Zeiller, Flore foss. bassin houil. d. Valen., p. 141, pl. xii. fig. 2, 1886.

^{page 131 note †} See Kidston, Mem. Musée roy. d'hist. nat. de Belgique, vol. iv. p. 221, pl. xiv. figs. 1–4, 4a; pl. xv. figs. 2, 3; and text-fig. 35.

^{page 131 note ‡} In letter of October 19, 1913.

^{page 132 note *} Sternb, ., Essai flore monde prim., vol. i. fasc. ii. pp. 29 and 35Google Scholar; fasc. iv. p. viii, pl. xvi. fig. 3, pl. xvii. fig. 1.

^{page 132 note †} Bassin houil. et perm. de Blanzy et du Creusot. p. 140, 1906.

^{page 133 note *} Trans. Roy. Soc. Edin., vol. xxxvii. p. 342, pl. iv. figs. 13, 14, 1893.

^{page 133 note †} No. 3736.

^{page 135 note *} Zeiller, Flore foss. bassin houil. d. Valen., p. 708 (footnote), 1888.

^{page 136 note *} Icones fossilium sectiles pl. xvi. fig. 200.

^{page 136 note †} Traité d. paléont. végét., vol. ii. p. 63.

^{page 139 note *} Sigillarien d. preuss. Steink., I. Gruppe d. Favularien, p. 31, pl. iii. (ix.) fig. 37.

^{page 140 note *} Proc. York. Geol. and Polytech. Soc., vol. xiv. pp. 353 and 385, pl. lviii. fig. 1, 1902.

^{page 141 note *} Loc. cit.

^{page 141 note †} Loc. cit.

^{page 142 note *} Vers. d. böhm. Ablager., Abth. iii. pl. ix. figs. 3–5, 1876.

^{page 142 note †} Sigillaria Dournaisii Brongt., Hist. d. végét. foss., p. 441, pl. cliii. fig. 5.

^{page 142 note ‡} Sigillaria d. preuss. Steink., No. I. p. 47, pl. xiii. figs. 81–82, 1887.

^{page 142 note §} Koehne unites Sigillaria Hauchecornei Weiss with Sigillaria mamillaris as a variety.

^{page 143 note *} Catal. Palœoz. Plants, p. 186, 1886.

^{page 144 note *} In Rogers, Geol. of Pennsyl., p. 872, pl. xiv. fig. 3, 1858. Coal Flora, p. 490, pl. lxxiii. fig. 1.

^{page 144 note †} “Sigillariastamme,” Abhandl. d. königl. preuss. geol. Landesanstalt, neue Folge, Heft xliii. p. 54, 1904.

^{page 146 note *} See Zeiller, Flore foss. bassin houil. d. Valen., p. 600, pl. lxxxix. figs. 1 and 4.

^{page 147 note *} Phil. Trans., loc. cit., p. 325.

^{page 150 note *} Phil. Trans., ser. B, vol. cxcix. p. 294, plates, 1901.

^{page 150 note †} Phil. Trans., p. 314, 1901.

^{page 153 note *} Flore foss. terr. houil. d. Commentry, part ii. p. 593, pl. lxxii. figs. 10, 11, 1890.

^{page 154 note *} Dyas, p. 145, pl. xxxi. fig. 16, 1861–62.

^{page 154 note †} Flore carbon. du départ, de la Loire, p. 235, pl. xxvi. fig. 16.

^{page 154 note ‡} Flore foss. terr. houil. d. Commentry part ii. p. 600, pl. lxxii. figs. 10, 11, 1890.

^{page 154 note §} Loc. cit.

^{page 155 note *} Cardiocarpum fluitans, Dawson, , Quart. Journ. Geol. Soc., vol. xx. p. 165, pl. xii. fig. 74, 1865.Google Scholar

^{page 155 note †} Coal Flora p. 569, pl. lxxxv. figs. 49, 50.

^{page 155 note ‡} Loc. cit., p. 568, pl. lxxxv. figs. 46, 47.

^{page 155 note §} Commissão de Estudos das Minas de Carvão de Pedra do Brazil: Final Report, 1908, p. 565, pl. x. fig. 9.

^{page 155 note ║} Loc. cit., p. 563, pl. x. fig. 10.

^{page 156 note *} The specimens on which these observations were made were shown to me by the late Dr Duns. All those with the associated Samaropsis acuta were the Eremopteris artemisiæfolia, and one of the specimens which he gave me on that occasion is in my collection, No. 769. None of his specimens bore any locality, but from an examination of his examples I believe they all came from the Northumberland or Durham Coal Field, as the matrix and general appearance agree with specimens from that locality.

^{page 156 note †} Quart. Journ. Geol. Soc., vol. lxv. p. 29, pl. i. fig. 5. (Enlarged 2 times.)

^{page 156 note ‡} Geol. Survey of Ohio, vol. i. part ii., “Palæontology,” section iii. p. 373, pl. xliii. fig. 5, 1873. Lesqx, ., Coal Flora, p. 567, pl. lxxxv. fig. 41, 1879.Google Scholar

^{page 160 note *} In Arber, , Proc. Roy. Soc. London, vol. B, lxxvi. p. 251, pl. ii. figs. 7–11, 1905Google Scholar.

^{page 162 note *} Fruct. et sémin., p. 22, pl. i. fig. 17, 1848.

^{page 163 note *} See Kidston, and Jongmans, , Archives Néerlandaises d. Sc. exactes et nat., sér. iii., B, vol. i. p. 25, plate, 1911Google Scholar.

^{page 166 note *} Ann. of Bot., vol. xiv. p. 138; see also pp. 135–147.

^{page 166 note †} Ottawa Naturalist, July 1901, pp. 106–110; see also Scott, , Studies, 2nd ed., part ii. p. 611Google Scholar, and Zeiller, Éléments d. paléobot., p. 247.

^{page 166 note ‡} Loc. cit.

^{page 168 note *} Palaeobot. Zeitschrift, vol. i. Heft i. p. 46, figs. 1, 2, 1912.

^{page 169 note *} Dicranophyllum robustum, Zeiller, , Bull. Soc. géol. de France, 3^e sér., vol. vi. p. 613, pl. x. fig. 3, 1878Google Scholar.

^{page 170 note *} Potonié, Lehrbuch, p. 289.

^{page 170 note †} Elements, p. 255.

^{page 170 note ‡} Flore foss. terr. houil. de Commentry, part ii. p. 626, 1890.

^{page 170 note *} See also Seward, and Gowan, , Ann. of Bot., vol. xiv. p. 137, 1900.Google Scholar

^{page 170 note ║} Ann. Soc. géol. de Belgique, vol. xxxiv., Mémoires p. M., 193, 1907.

^{page 171 note *} See Zeiller, Végét. foss. d. terr. houil., p. 158, 1880.

^{page 173 note *} Note.—For references to Annularia galioides L. & H., sp., see ante, p. 121.

^{page 179 note *} New Mine Clay.

^{page 179 note †} Generally distributed.