Note 150 — Chapter III · ENEMIES OF THE MOLLUSCA—MEANS OF DEFENCE—MIMICRY AND PROTECTIVE COLORATION—PARASITIC MOLLUSCA—COMMENSALISM—VARIATION
Reading edition
Animal Life, p. 395. It should be mentioned that Von Möllendorff (Ber. Senck. Ges. 1890, p. 198) ridicules the whole theory.