Henry Webster Parker, The Spirit of Beauty: Essays Scientific and Aesthetic, New York, J.B. Alden, 1888, p. 83.

…the odor around the object associated with it. And there is no proof, despite the author’s human illustration , that it was other than habitual instinct that led Darwin’s quoted crab to remove shells from the vicinity of its hole. As to the « notheworthly intelligence » of caddis-worms in adjusting the specific gravity of their tubes to that of water, or to the movement of the water, the author himself elsewhere translates it as instinctive. So much for the intelligence of invertebrates, making up half the preliminary volume. With so high interpretation of the acts of brainless creatures,