[421] “Untersuchungen über den Bau der Brachiopoden,” Jena, 1892.
[422] “Vorläufige Mittheilungen über Brachiopoden,” Zool. Anz. Bd. viii. 1885.
[423] Hancock’s nomenclature is here used. The corresponding names used by King and Brooks are placed in brackets. Their nomenclature is used by many palaeontologists, and is adopted in Fig. [322].
[424] Development of the Brachiopoda, 1873 (Russian).
[425] “Histoire de la Thécidie,” Ann. d. Sci. Nat., Sér. 4, vol. xv., 1861.
[426] “On the Early Stages of Terebratulina septentrionalis,” Mem. Boston Soc. Nat. Hist., vol. ii., 1869. “On the Development of Terebratulina,” Ibid. vol. iii., 1873.
[427] “Choses de Nouméa,” Arch. d. Zool. exp. et gen., 2nd ser., vol. ix., 1891.
[428] J. Barrande, Syst. Silur. Bohème, vol. v., 1879. Hall and Clarke, Introd. Palaeozoic. Brach. (Palaeont. of New York, 1892–1894). Davidson, Monogr. Brit. Foss. Brach. (Palaeont. Soc., 1851–1884). Waagen, Salt Range Fossils (Mem. Geol. Surv. India, 1879–1885).
[429] The results of the investigations of King (Ann. Mag. Nat. Hist., 4th ser., vol. xii., 1873) and of Brooks (Chesapeake Zool. Laboratory, Scientific Results, p. 35, 1879), and the simple nomenclature of these authors are here followed in preference to those of others, owing to the difference of opinion amongst anatomists of the functions and homologies of the muscles. The lateral muscles enable the valves to move backwards and forwards on each other; the centrals close the shell; the umbonals open it; and the transmedians allow a sliding sideways movement of one valve across the other (see also p. 477).
[430] Davidson and King, Quart. Jour. Geol. Soc., xxx. (1874), p. 124.