Note 101 — THE INDIVIDUAL ORGANISM WITH REGARD TO FORM AND METABOLISM (continued 3)
Reading edition
The adaptive phenomena discovered by Gaidukow depend upon a real alteration in the formation of pigments. In the (primary) chromatic adaptation of pupae of Lepidoptera with respect to the colour of the ground they live upon, we only have the variable effects of pre-established chromatophores (Poulton, Phil. Trans. London, 178 B, 1888; Merrifield, Trans. Ent. Soc. London, 1898). The same holds for chromatic adaptations in crabs (Gamble and Keeble, Quart. Journ. Micr. Sci. 43, 1900; Minkiewicz, Arch. Zool. exp. et gén. sér. 4, 7, notes, 1907).