FOOTNOTES
[5] See on this point what was said in our first Chapter, No. I. p. 67.
[6] Seaside Studies, 2nd edit. p. 59, sq.
[7] Compare Leuckart: Ueber den Polymorphismus der Individuen. Gegenbaur: Grundzüge der Vergleichende Anatomie; and Huxley’s splendid monograph on the Oceanic Hydrozoa, published by the Ray Society.
[8] Lettres de Georges Cuvier à C. M. Pfaff, 1788-92. Traduites de l’Allemand, par Louis Marchant, 1858.