[23] These statements are taken from the following works in order:—Youatt on ‘The Horse,’ p. 48; Mr. Darvill, in ‘The Veterinary,’ vol. viii. p. 50. With respect to Robson, see ‘The Veterinary,’ vol. iii. p. 580; Mr. Lawrence on ‘The Horse,’ 1829, p. 9; ‘The Stud Farm,’ by Cecil, 1851; Baron Cameronn, quoted in ‘The Veterinary,’ vol. x. p. 500.
[24] ‘Recreations in Agriculture and Nat. Hist.,’ vol. i. p. 68.
[25] ‘Ueber die Eigenschaften,’ etc., 1828, s. 107.
[26] Bronn’s ‘Geschichte der Natur,’ Band ii. 2 s. 132.
[27] Vrolik has discussed this point at full length in a work published in Dutch, from which Sir J. Paget has kindly translated for me passages. See, also, Isidore Geoffroy St. Hilaire’s ‘Hist. des Anomalies,’ 1832, tom. i. p. 684.
[28] ‘Massachusetts Medical Society,’ vol. ii. No. 3; and ‘Proc. Boston Soc. of Nat. Hist.,’ vol. xiv. 1871, p. 154.
[29] Dr. J. W. Ogle gives a case of the inheritance of deficient phalanges during four generations. He adds references to various recent papers on inheritance, ‘Brit. and For. Med.-Chirurg. Review,’ April 1872.
[30] For these several statements, see Dr. Struthers ‘Edinburgh New Phil. Journal,’ July, 1863, especially on intermissions in the line of descent. Prof. Huxley, ‘Lectures on our Knowledge of Organic Nature,’ 1863, p. 97. With respect to inheritance, see Dr. Prosper Lucas, ‘L’Hérédité Nat.,’ tom. i. p. 325. Isid. Geoffroy, ‘Anom.,’ tom. i. p. 701. Sir A. Carlisle, in ‘Phil. Transact.,’ 1814, p. 94. A. Walker, on ‘Intermarriage,’ 1838, p. 140, gives a case of five generations; as does Mr. Sedgwick in ‘Brit. and Foreign Medico-Chirurg. Review,’ April, 1863, p. 462. On the inheritance of other anomalies in the extremities see Dr. H. Dobell, in vol. xlvi. of ‘Medico-Chirurg. Transactions,’ 1863; also Mr. Sedgwick in op. cit., April, 1863, p. 460. With respect to additional digits in the negro see Prichard, ‘Physical History of Mankind.’ Dr. Dieffenbach (‘Jour. Royal Geograph. Soc.,’ 1841, p. 208) says this anomaly is not uncommon with the Polynesians of the Chatham Islands; and I have heard of several cases with Hindus and Arabs.
[31] Meckel and Isid G. St. Hilaire insist on this fact. See also M. A. Roujou, ‘Sur quelques Analogies du Type Humain,’ p. 61; published, I believe, in the ‘Journal of the Anthropolog. Soc. of Paris,’ Jan. 1872.
[32] ‘The Poultry Chronicle,’ 1854, p. 559.