[2711] See B. iv. c. 35.
[2712] This is in reality the Coccus ilicis of Linnæus, a small insect of the genus Coccus, the female of which, when impregnated, fastens itself to a tree from which they derive nourishment, and assumes the appearance of a small grain: on which account they were long taken for the seeds of the tree, and were hence called grains of kermes. They are used as a red and scarlet dye, but are very inferior to cochineal, which has almost entirely superseded the use of the kermes. The colour is of a deep red, and will stand better than that of cochineal, and is less liable to stain.
[2713] Or pina. The Pinna marina, Cuvier says, is a large bivalve shell-fish, which is remarkable for its fine silky hair, by means of which it fastens itself to the bottom of the sea.
[2714] The poet Oppian, Halieut. B. ii. l. 186, relates the same story about the pinna and its protector; which is also mentioned by Cicero, Plutarch, and Aristotle.
[2715] We have already had an account of one pinnotheres, in c. 51. Some of the editions, however, make a difference in the spelling of the name, and call the animal mentioned in the 51st Chapter, “pinnotheres,” and the one here spoken of, the “pinnoteres,” the “guardian of the pinna;” from the Greek verb τηρέω, “to keep,” or “guard.” “Pinnophylax” has the same meaning.
[2716] Cuvier says, that in the shell of the pinna, as, in fact, of all the bivalves, there are often found little crabs, which are, as it were, imprisoned there; and that it is this fact that has given rise to the story of the treaty of amity between these two animals, which appears in various authors, and is related in various forms, which only agree in being devoid of truth. Cuvier says that a careful distinction must be made between the pinnotheres of this Chapter, the one of which Aristotle makes mention, and that which is mentioned by Pliny in c. 51, the hermit-crab of the moderns. There can, however, be but little doubt that they are different accounts of the same animal.
[2717] The whole, nearly, of this Chapter is taken from Aristotle, B. v. c. 16.
[2718] Plutarch speaks of this fish, in his “Treatise on the Instincts of Animals;” also Oppian, Halieut. B. ii. l. 62. The Raia torpedo of Linnæus, Cuvier says, has on each side of the body a galvanic organ, which produces an electric shock, similar to that communicated by the use of the Leyden vial. By this means it baffles its enemies, and drives them away; or else, having stupefied them, devours them at its leisure.
[2719] Cuvier confirms this statement. The liver of the torpedo, he says, is very delicate eating, as, indeed, is that part in most of the ray genus.
[2720] Oppian, Halieut. B. ii. l. 86; Ælian, Hist. Anim. B. ix. c. 24; and Cicero, De Nat. Deor. make mention of this.