Bramble-frogs,[1806] also, which live both on land and in water, are replete with various medicinal substances, which they are said to discharge each day, and to take in again with their food, of which they only retain the poisonous parts. CHAP. 49.—THE SEA-CALF; BEAVERS; LIZARDS. The sea-calf, too, lives equally in the sea and on land, being possessed of the same degree of intelligence as the beaver. It vomits forth its gall, which is useful for many purposes in medicine; also the rennet,[1807] which serves as a remedy in epilepsy; for it is well aware that it is hunted for these substances. Theophrastus informs us, that lizards[1808] also cast their skins like the serpent, and instantly devour them, thus depriving us of a powerful remedy for epilepsy; he says, too, that the bite of the lizard is fatal in Greece, but harmless in Italy.[1809] CHAP. 50. (32.)—STAGS. Stags, although the most mild of all animals, have still their own feelings of malignancy;[1810] when hard pressed by the hounds, of their own accord they fly for refuge to man; and when the females bring forth, they are less anxious to avoid the paths which bear traces of human footsteps, than solitary spots which offer a retreat to wild beasts.[1811] They become pregnant after the rising of the constellation Arcturus;[1812] they bring forth after a gestation of eight months, and sometimes produce two young ones. They separate after conception, but the males, upon being thus abandoned, become maddened with the fury of their passion; they dig up the earth, and their muzzles become quite black, until they have been washed by the rain.[1813] The females, before they bring forth, purge themselves by means of a certain herb, which is called seselis, by the use of which parturition is rendered more easy. After delivery, they take a mixture of the two plants called seselis[1814] and aros,[1815] and then return to the fawn; they seem desirous, for some reason or other, that their first milk, after parturition, should be impregnated with the juice of these plants. They then exercise the young ones in running, and teach them how to take to flight, leading them to precipices, and showing them how to leap. The sexual passion of the male having been now satisfied, he repairs to the pasture lands with the greatest eagerness. When they feel themselves becoming too fat, they seek some retired spot, thus acknowledging the inconvenience arising from their bulk. Besides this, they continually pause in their flight, stand still and look back, and then again resume their flight when the enemy approaches. This pause is occasioned by the intense pain which they feel in the intestines, a part which is so weak, that a very slight blow will cause them to break within. The barking of a dog instantly puts them to flight, and they always run with the wind, in order that no trace of them may be left. They are soothed by the shepherd’s pipe