[15] ‘De l’Espèce,’ tom. ii. pp. 54, 58, 60.

[16] Mr. Sedgwick gives many instances in the ‘British and Foreign Med.-Chirurg. Review,’ April and July, 1863, pp. 448, 188.

[17] In his edit. of ‘Youatt on the Pig,’ 1860, p. 27.

[18] Dr. P. Lucas, ‘Héréd. Nat.,’ tom. ii. pp. 314, 892: see a good practical article on the subject in ‘Gard. Chronicle,’ 1856, p. 620. I could add a vast number of references, but they would be superfluous.

[19] Kölreuter gives curious cases in his ‘Dritte Fortsetzung,’ 1766, ss. 53, 59; and in his well-known ‘Memoirs on Lavatera and Jalapa.’ Gärtner, ‘Bastarderzeugung,’ ss. 437, 441, etc. Naudin in his “Recherches sur l’Hybridité,” ‘Nouvelles Archives du Muséum,’ tom. i. p. 25.

[20] Quoted by Mr. Sedgwick in ‘Med.-Chirurg. Review,’ April, 1861, p. 485. Dr. H. Dobell in ‘Med.-Chirurg. Transactions,’ vol. xlvi., gives an analogous case in which, in a large family, fingers with thickened joints were transmitted to several members during five generations; but when the blemish once disappeared it never reappeared.

[21] Verlot ‘Des Variétés,’ 1865, p. 63.

[22] ‘Nouvelles Archives du Muséum,’ tom. i. p. 25. Alex. Braun (in his ‘Rejuvenescence,’ Ray Soc., 1853, p. 315) apparently holds a similar opinion.

[23] Mr. Teebay in ‘The Poultry Book,’ by Mr. Tegetmeier, 1866, p. 72.

[24] Quoted by Hofacker ‘Ueber die Eigenschaften,’ etc., s. 98.