[1798] Aristotle, De Gener. Anim. B. iii. c. 6, and Hist. Anim. B. vi. c. 32, accounts for the vulgar error, by stating that the hyæna has a peculiar structure of the parts about the anus, which might, to an unpractised eye, give the idea, that it possesses the generative organs of both sexes. Ælian, Anim. Nat. B. i. c. 25, and Oppian, Cyneget. B. iii. c. 289, have adopted this erroneous opinion. What is said respecting the hyæna, in the remaining part of this Chapter, is mostly without foundation.—B.
[1799] We have had some account given of the mantichora, in c. 30. The mantichora and the corocotta are altogether imaginary.—B. Cuvier, in Ajasson, vol. vi. p. 447; Lemaire, vol. iii. p. 439, thinks that the stories of the corocotta and the catoblepas, owe their origin to mutilated accounts of the hyæna, and the animal known to us as the gnu.
[1800] According to Cuvier, what Pliny here says respecting the herds of wild asses, and the power of the old males, is correct; but it is doubtful whether there is any foundation for what is said about the castration of the newly-born animals; Ajasson, ubi supra; Lemaire, vol. iii. p. 440.—B.
[1801] “De aquaticis et iisdem terrestribus;” although these words are inserted in the title of this Chapter, the subject is not treated of in it.—B.
[1802] Pliny here adopts the vulgar opinion respecting the origin of the substance called “castor,” and in B. xxxii. c. 13, gives a more correct description, which he had derived from a physician, named Sextius. It is a fetid, oily substance, secreted by a gland situate near the prepuce. Cuvier remarks, that when the gland becomes distended with this secretion, the animal may probably get rid of it by rubbing the part against a stone or tree, and in this way, leave the castor for the hunters, thus giving rise to the vulgar error. Ajasson, vol. vi. p. 448; Lemaire, vol. iii. p. 440.—B.
[1803] The beaver has the most powerful teeth of any animal of the class Rodentia, to which it belongs; it uses them for cutting down trees, with which it constructs its habitation. Aristotle, Hist. Anim. B, viii. c. 5, refers to this.—B.
[1804] The tail is covered with a kind of scale, and is flattened; but, in its internal organization, is formed like those of other quadrupeds.—B.
[1805] See B. xxxii. c. 52.
[1806] Pliny, speaking of the different kinds of frogs, B. xxxii. c. 18, says, “There are some which live only in the hedges, and thence have the name of rubeta, or bramble frogs.” It seems impossible to identify this reptile with any of our known animals: and we may conclude that there is no foundation for the statement. Ælian gives an account of the venomous nature of this animal. Anim. Nat. B. xvii. c. 12.—B.
[1807] As Cuvier remarks, it is impossible that any animal can discharge by vomiting what Pliny terms the “coagulum,” which is the fourth stomach of a ruminant animal; the same substance which, under the name of rennet, is employed to coagulate milk. He conjectures, that the error may have originated in the observation, that occasionally in fish, when suddenly drawn out of the water, the air-bladder is protruded from the mouth, which may have been mistaken for the stomach. The circumstance is mentioned by Aristotle, Hist. Anim. B. viii. c. 23, and by Ælian, Anim. Nat. B. iii. c. 19, as well as the vomiting of the bile; respecting this latter, we may remark, that vomiting is produced in various animals, when under the influence of extreme terror.—B.