Note 1836 — BOOK VIII. THE NATURE OF THE TERRESTRIAL ANIMALS.

It is possible that the quills of the porcupine may be stuck into the skin of the dog so firmly, as to be detached from their natural situation; but there is no reason to believe that they can be darted out or projected by any exertion of the animal. Ælian, Anim. Nat. B. i. c. 31, and B. xii. c. 26, describes the hystrix; see also Aristotle, Hist. Anim. B. vi. c. 30.—B.