On the Origin and Metamorphoses of Insects

by Sir John Lubbock

[35] Thomson, on the Embryology of the Echinodermata, Natural History Review, 1863, p. 415. See also Agassiz, “Embryology of the Starfish,” p. 62.

[36] A. Agassiz, Embryology of Echinoderms, p. 18.

[37] Hincks. British Hydroid Zoophytes, pp. 120-147.

[38] Zeits. für Wiss. Zool. 1864, p. 228.

[39] Introduction to Entomology, 6th ed. vol. i. p. 61.

[40] Métamorphoses de l’Homme et des Animaux, p. 133. See also Carpenter, Principles of Physiology. 1851, p. 389.

[41] Darwin, Origin of Species, 4th ed. p. 532.

[42] Principles of Biology, vi. p. 349.

[43] For differences in larva consequent on variation in the external condition, see ante, p. 61.

[44] See Hincks. British Hydroid Zoophytes, P. lxii. Agassiz, Sea-side Studies, p. 43.