^{page 491 note 1} Eleventh Internat. Geol. Congress Report, 1910, p. 775.Google Scholar

^{page 492 note 1} Nova Acta Cæs. Leop. Car., 1887 and 1891.

^{page 492 note 2} Hinde, Geol. Mag., Dec. III, Vol. IV, p. 226, 1887.Google Scholar

^{page 492 note 3} Centralb. f. Min., 1904, p. 193.Google Scholar

^{page 492 note 4} Research in China, 1907.Google Scholar

^{page 492 note 5} Chapman, , Proc. Roy. Soc. Vict., 1911, p. 308.Google Scholar

^{page 492 note 6} The Silurian Rocks of Britain, vol. i, Scotland (Mem. Geol. Surv. U.K.), pp. 487, 494, 496, 500.Google Scholar

^{page 493 note 1} Geol. Mag., Dec. III, Vol. V, p. 22, 1888.Google Scholar

^{page 494 note 1} Geol. Mag., Dec. III, Vol. II, p. 534, 1885.Google Scholar

^{page 494 note 2} Geol. Mag., Dec. IV, Vol. I, p. 145 et seqq., 1894.Google Scholar

^{page 494 note 3} “Faunistische Uebersicht d. Et. 5”: Vid. Selsk. Skr., 1897, No. 3.

^{page 494 note 4} naturw, Schr. d.. ver. f. Schleswig-Holstein, , Bd. xi, 1897,Google Scholar and references there given.

^{page 494 note 5} Etage 5 i. Asker. Norges Geol. undersogeles Aarbog, 1902, No. 1.

^{page 494 note 6} Silurfossiler og pressede Konglomerate, 1882.Google Scholar “Bømmeløen og Karmøen”: Med. omgiveleser, 1888.Google Scholar

^{page 495 note 1} Et orienterende niveau Bergenskiffe, Rhabdoporellenkalk von Kuven und Valle, Bergens Museums, Aarbog, 1897.Google Scholar

^{page 495 note 2} Am. Journ. Sci., vol. xxx, p. 355, 1885.Google Scholar

^{page 495 note 3} Geol. Mag., Dec. III, Vol. IV, p. 226, 1887.Google Scholar

^{page 495 note 4} See Haug, , vol. ii, pt. i, p. 643.Google Scholar

^{page 495 note 5} Q.J.G.S., vol. xlix, p. 236, 1893.Google Scholar

^{page 495 note 6} Schr. d. naturw. ver. f. Schleswig-Holstein, , Bd. xi, 1897, and references there given.Google Scholar

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^{page 496 note 1} Bot. Cent., vol. lii, p. 9, 1890.Google Scholar

^{page 496 note 2} Geol. Foren. Forh. Stock., Bd. xxxii, Hft. v, p. 1397, 1910.Google Scholar

^{page 496 note 3} Bull. Geol. Surv. Queensland, 1900, No. 12, pp. 25–32, pl. iii.Google Scholar

^{page 496 note 4} Rep. Austr. Assoc. Adv. Sci., 1907–1908, pp. 377–86, pls. i–iii, 1908.Google Scholar

^{page 496 note 5} Rec. Geol. Surv. Wales, N.S., vol. viii, pt. iv, p. 308, pl. xlvii, 1909.Google Scholar

^{page 497 note 1} Q.J.G.S., vol. lxviii, pi. lxvii, fig. 2, 1912.Google Scholar

^{page 497 note 2} From Orton, a village between Shap and Ravenstonedale, where this organism occurs in great abundance.

^{page 497 note 3} One of these is also exhibited at the Jermyn Street Museum.

^{page 497 note 4} Mém. du Musée Roy. d'Hist. Nat. de Belgique, tom. iii, 1906.Google Scholar

^{page 498 note 1} Geol. Mag., Dec. III, Vol. V, 1888.Google Scholar

^{page 498 note 2} Q.J.G.S., vol. xlvii, p. 280, pl. xi, figs. 1, 2, 1890.Google Scholar