[59] Caracalla killed one of them in the Circus; Dion, lib. lxxvii. Consult also Gisb. Cuperi de Eleph. in nummis obviis, ex. ii. cap. vii.
[60] See Lichtenstein, Comment. de Simiarum quotquot veteribus innotuerunt formis. Hamburgh, 1791.
[61] The Jerboa is impressed upon the medals of Cyrene, and indicated by Aristotle under the name of Two-legged Rat.
[62] Plin. viii. 31. Arist. lib. ii. cap. 40. Phot. Bibl., Art. 72; Ctes. Indic. Ælian, Anim., iv. 21.
[63] Ælian, Anim. iv. 27.
[64] Ælian, xvi. 20. Photius, Bibl., art. 72. Ctes. Indic.
[65] See Corneille Lebrun, Voyage en Muscovie, en Perse et aux Indes, tom. ii. See also the German work by M. Heeren, on the Commerce of the Ancients.
[66] Photius, Bibl., art. 250. Agatharchid., Excerpt. hist., cap. xxxix. Ælian, Anim. xvii. 45. Plin. viii. 21.
[67] I have even seen, in the collection of the late Mr Addrien Camper, a skeleton of a hyena, in which several of the vertebræ of the neck were anchylosed. It was probably from seeing some similar individual that the character in question was attributed to all hyenas. This animal ought to be more subject than any other to such an accident, on account of the prodigious power of the muscles of its neck, and the frequent use which it makes of them. When the hyena has laid hold of any thing, it is easier to drag it along by it than to wrest it from its jaws; and it is this circumstance which has caused the Arabs to consider it as the emblem of invincible obstinacy.
[68] It does not in reality change its sex, but it has an orifice in the perineum, which might make it be supposed to be hermaphrodite.