[59] Loeb, J., and Bancroft, F. W., Jour. Exper. Zoöl., 1912, xii., 381.
[60] Loeb, J., Arch. f. d. ges. Physiol., 1903, xcix., 323; 1904, civ., 325; Arch. f. Entwcklngsmech., 1910, xxx., II., 44; 1914, xl., 310; Science, 1914, xl., 316.
[61] Godlewski, E., Arch. f. Entwcklngsmech., 1906, xx., 579.
[62] Kupelwieser, H., Arch. f. Entwcklngsmech., 1909, xxvii., 434; Arch. f. Zellforsch., 1912, viii., 352.
[63] See Chapter II.
[64] Loeb, J., Science, 1914, xl., 316; Am. Naturalist, 1915, xlix., 257.
[65] Loeb, Arch. f. Entwcklngsmech., 1914, xl., 310.
[66] Godlewski, E., Arch. f. Entwcklngsmech., 1911, xxxiii., 196.
[67] Herlant, M., Anat. Anzeiger, 1912, xlii., 563.
[68] Loeb, J., Jour. Exper. Zoöl., 1914, xvii., 123.