[155] See translation, giving the gist of this paper, in Huxley's Lectures on the Elements of Comparative Anatomy, pp. 282-6, London, 1864.

[156] Reil's Archiv. f. Physiol., vii., 1807.

[157] Leçons d'anatomie comparée, 3rd ed., Brussels reprint, i., p. 414, 1836.

[158] In his Programm, U. d. Bedeut. d. Schädelknochen, 1807.

[159] Traité élémentaire d'anatomie comparée (French trans.), vol. iii., Paris, 1835. First developed in his volume Von den Ur-Theilen des Knochen und Schalen-Gerustes, Leipzig, 1828.

[160] Dutrochet in 1821 had tried to prove that the bones of the members belong to the type of the vertebra—the dicone.

[161] Isis, pp. 552-9, 1820 (2).

[162] Mém. Mus. d'Hist. nat., ix., 1822.

[163] Cuvier and Valenciennes, Hist. nat. Poissons, i., p. 311, f.n.