[117] 'Archiv. Skand. Beiträge zur Naturgesch.,' viii. s. 397-413.
[118] In his 'Essays on Nat. Hist.,' 1838. Mr. Hewitt gives analogous cases with hen-pheasants in 'Journal of Horticulture,' July 12, 1864, p. 37. Isidore Geoffroy Saint Hilaire, in his 'Essais de Zoolog. Gén.' (suites à Buffon, 1842, pp. 496-513), has collected such cases in ten different kinds of birds. It appears that Aristotle was well aware of the change in mental disposition in old hens. The case of the female deer acquiring horns is given at p. 513.
[119] 'Cottage Gardener,' 1860, p. 379.
[120] 'Art de faire Eclorre,' &c., 1749, tom. ii. p. 8.
[121] Sir H. Holland, 'Medical Notes and Reflections,' 3rd edit., 1855, p. 31.
[122] Prof. Thomson on Steenstrup's Views on the Obliquity of Flounders: 'Annals and Mag. of Nat. Hist.,' May, 1865, p. 361.
[123] Dr. E. von Martens, in 'Annals and Mag. of Nat. Hist.,' March, 1866, p. 209.
[124] Darwin, 'Balanidæ,' Ray Soc., 1854, p. 499: see also the appended remarks on the apparently capricious development of the thoracic limbs on the right and left sides in the higher crustaceans.
[125] Mormodes ignea: Darwin, 'Fertilization of Orchids,' 1862, p. 251.
[126] 'Journal of Horticulture,' July, 1864, p. 38. I have had the opportunity of examining these remarkable feathers through the kindness of Mr. Tegetmeier.