[300] Souvenirs d'un Naturaliste, 2 vols., Paris, 1854. Eng. Trans. as Rambles of a Naturalist on the Coasts of France, Spain, and Italy, 2 vols., 1857.
[301] Milne-Edwards later published a classical textbook on comparative anatomy and physiology—Leçons sur la Physiologie et l'Anatomie comparées, 14 vols., Paris, 1857-80.
[302] Paris, 1834-40. Three volumes of the Suites à Buffon.
[303] Paris, 1865. Two volumes of the Suites à Buffon.
[304] U. d. Metamorphose der Ophiuren u. Seeigel., Berlin, 1848. U. d. Metamorphose der Holothurien u. Asterien., Berlin, 1851.
[305] As I have been unable to obtain a copy of the Introduction, the passages which follow are taken from the Rapport of 1867, where Milne-Edwards gives a complete exposition of his doctrine, sometimes in the words of the original.
[306] This principle was first developed by Milne-Edwards in 1827, in the Dictionnaire classique d'Hist. naturelle. It was probably suggested to him by his studies on the Crustacea, among which the principle is so beautifully exemplified in the concentration and specialisation of the appendages and the ganglionic chain.
[307] Studied by Isidore Geoffroy St Hilaire in his paper Classification parallélique des Mammifères, C. R. Acad. Sci., xx., 1845. Remarked upon by Cuvier, Règne animal., i., p. 171, 1817, also by de Blainville.
[308] Cuvier et Valenciennes, Hist. nat. des Poissons, i., p. 550, 1828.
[309] Myxinoiden, Th. I. Abh. k. Akad. Wiss. Berlin for 1834, pp. 100, 110, 179, etc.