, p.
490.

[909] Paget, 'Lectures on Pathology,' p. 27; Virchow, 'Cellular Pathology,'
translat. by Dr. Chance, pp. 123, 126, 294; Claude Bernard, 'Des Tissus
Vivants,' pp. 177, 210, 337; Mueller's 'Physiology,' Eng. translat., p.
290.

[910] Virchow, 'Cellular Pathology,' trans. by Dr. Chance, 1860, pp. 60,
162, 245, 441, 454.

[911] Idem, pp. 412-426.

[912] _See_ Rev. J. M. Berkeley, in 'Gard. Chron.,' April 28th, 1866, on a
bud developed on the petal of the Clarkia. _See_ also H. Schacht, 'Lehrbuch
der Anat.,' &c., 1859, Theile ii. s. 12, on adventitious buds.

[913] Mr. Herbert Spencer ('Principles of Biology,' vol. ii. p. 430) has
fully discussed the antagonism between growth and reproduction.

[914] The male salmon is known to breed at a very early age. The Triton and
Siredon, whilst retaining their larval branchiae, according to Filippi and
Dumeril ('Annals and Mag. of Nat. Hist.,' 3rd series, 1866, p. 157), are
capable of reproduction. Ernst Haeckel has recently ('Monatsbericht Akad.
Wiss. Berlin,' Feb. 2nd, 1865) observed the surprising case of a medusa,
with its reproductive organs active, which produces by budding a widely
different form of medusa; and this latter also has the power of sexual
reproduction. Krohn has shown ('Annals and Mag. of Nat. Hist.,' 3rd series,
vol. xix., 1862, p. 6) that certain other medusae, whilst sexually mature,
propagate by gemmae.

[915] _See_ his excellent discussion on this subject in 'Nouvelles Archives
du Museum,' tom. i. p. 151.

[916] Various physiologists have insisted on this distinction between
growth and development. Prof. Marshall ('Phil. Transact.,' 1864, p. 544)
gives a good instance in microcephalous idiots, in which the brain
continues to grow after having been arrested in its development.

[917] 'Compte Rendu,' Nov. 14, 1864, p. 800.

[918] As previously remarked by Quatrefages, in his 'Metamorphoses de
l'Homme,' &c., 1862, p. 129.

[919] Guenther's 'Zoological Record,' 1864, p. 279.

[920] Sedgwick, in 'Medico-Chirurg. Review,' April 1863, p. 454.

[921] Isid. Geoffroy St. Hilaire, 'Hist. des Anomalies,' tom. i., 1832, pp.
435, 657; and tom. ii. p. 560.

[922] Virchow, 'Cellular Pathology,' 1860, p. 66.

[923] Moquin-Tandon, 'Teratologie Veg.,' 1841, pp. 218, 220, 353. For the
case of the pea, _see_ 'Gardener's Chron.,' 1866, p. 897.

[924] Mueller's 'Physiology,' Eng. translat., vol. i. p. 407.

[925] _See_ some remarks to this effect by S