Note 118 — Chapter VI
Reading edition
Lyon, E. P., Arch. f. Entwcklngsmech., 1907, xxiii., 151; Morgan, T. H., and Spooner, G. B., ibid., 1909, xxviii., 104; Morgan, Jour. Exper. Zoöl., 1910, ix., 594; Conklin, E. G., ibid., 1910, ix., 417; Lillie, F. R., Biol. Bull., 1909, xvi., 54.