But it is mice that surpass all the other animals in fecundity; and it is not without some hesitation that I speak of them, although I have Aristotle and some of the officers of Alexander the Great for my authority. It is said that these animals generate by licking one another, and not by copulation. They have related cases where a single female has given birth to one hundred and twenty young ones, and in Persia some were found, even pregnant themselves,[3122] while yet in the womb of the parent. It is believed also that these animals will become pregnant on tasting salt. Hence we find that we have no longer any reason to wonder how such vast multitudes of field-mice devastate the standing corn; though it is still a mystery, with reference to them, in what way it is that such multitudes die so suddenly; for their dead bodies are never to be found, and there is not a person in existence that has ever dug up a mouse in a field during the winter. Multitudes of these animals visit Troas, and before this they have driven away the inhabitants in consequence of their vast numbers.
They multiply greatly during times of drought; it is said also that when they are about to die, a little worm grows in their head. The mice of Egypt have hard hairs, just like those of the hedge-hog. They walk on their hind feet, as also do those of the Alps. When two animals couple of different kinds, the union is only prolific if the time of gestation is the same in both. Among the oviparous quadrupeds, it is generally believed that the lizard brings forth by the mouth, though Aristotle denies the fact. These animals, too, do not sit upon their eggs, as they forget in what place they have laid them, being utterly destitute of memory; hence it is that the young ones are hatched spontaneously.
CHAP. 86. (66.)—SALAMANDERS.
We find it stated by many authors,[3123] that a serpent is produced from the spinal marrow of a man. Many creatures, in fact, among the quadrupeds even, have a secret and mysterious origin.
(67) Thus, for instance, the salamander, an animal like a lizard in shape, and with a body starred all over, never comes out except during heavy showers, and disappears the moment it becomes fine. This animal is so intensely cold as to extinguish fire by its contact, in the same way as ice does. It spits forth a milky matter from its mouth; and whatever part of the human body is touched with this, all the hair falls off, and the part assumes the appearance of leprosy.
CHAP. 87. (68.)—ANIMALS WHICH ARE BORN OF BEINGS THAT HAVE NOT BEEN BORN THEMSELVES—ANIMALS WHICH ARE BORN THEMSELVES BUT ARE NOT REPRODUCTIVE—ANIMALS WHICH ARE OF NEITHER SEX.
Some animals, again, are engendered of beings that are not engendered themselves, and have no such origin as those above mentioned, which are produced in the spring, or at some stated period of the year. Some of these are non-productive, the salamander, for instance, which is of no sex, either male or female; a distinction also, which does not exist in the eel and the other kinds that are neither viviparous nor oviparous. The oyster also, as well as the other shell-fish that adhere to the bottom of the sea or to rocks, are of neither sex. Again, as to those animals which are able to engender of themselves, if they are looked upon as divided into male and female, they do engender something, it is true, by coupling, but the produce is imperfect, quite dissimilar to the animal itself, and one from which nothing else is reproduced; this we find to be the case with flies, when they give birth to maggots. This fact is better illustrated by the nature of those animals which are known as insects; a subject, indeed, very difficult of explanation, and one which requires to be treated of in a Book[3124] by itself. We will, therefore, proceed for the present with our remarks upon the instincts of the animals that have been previously mentioned.
CHAP. 88. (69.)—THE SENSES OF ANIMALS—THAT ALL HAVE THE SENSES OF TOUCH AND TASTE—THOSE WHICH ARE MORE REMARKABLE FOR THEIR SIGHT, SMELL, OR HEARING—MOLES—WHETHER OYSTERS HAVE THE SENSE OF HEARING.
Man excels more especially in his sense of touch, and next, in that of taste. In other respects, he is surpassed by many of the animals. Eagles can see more clearly than any other animals, while vultures have the better smell; moles hear more distinctly than others, although buried in the earth, so dense and sluggish an element as it is; and what is even more, although every sound has a tendency upwards, they can hear the words that are spoken; and, it is said, they can even understand it if you talk about them, and will take to flight immediately. Among men, a person who has not enjoyed the sense of hearing in his infancy, is deprived of the powers of speech as well; and there are none deaf from their birth who are not dumb also. Among the marine animals, it is not probable that oysters enjoy the sense of hearing, but it is said that immediately a noise is made the solen[3125] will sink to the bottom; it is for this reason, too, that silence is observed by persons while fishing at sea.