The eye of the hyena was supposed to furnish a stone called _hyænia_ and Pliny writes that these animals were hunted to secure possession of it. Like rock-crystal and many other decorative stones, this _hyænia_ was thought to give the power to foretell the future, if it were placed beneath the tongue.[346] Because of the hyena’s uncanny habit of feeding on carrion, and unearthing dead bodies from graves, it has often been associated with necromancy and with evil spirits. The _lacrima cervi_, or “stag’s tear,” is not to be confounded with the bezoar stone according to Scaliger, who maintains that it was a bony concretion that formed in the corner of a stag’s eye only after the animal had passed its hundredth year; as the stag never attains this age he might as well have said that the existence of this “tear” was a fable. However, he describes it as though he had carefully inspected a specimen, saying that it was so smooth and light that it would almost slip through the fingers of anyone who held it in his hand. It had similar powers to those of the bezoar, being a powerful antidote to poisons and a cure for the plague if powdered and given with wine; these good effects resulting from the excessively profuse perspiration that followed the administration of the dose.[347] These fabled stag’s tears, though often praised as substitutes for the bezoar, were not believed in by all the early writers, one of them, Rollenhagen, giving expression to a caustic opinion that might do credit to a writer of our own day. Alluding to the many reports of the existence of such “tears,” shed by the animals because of the pains they suffered after indulging in a diet of serpents, he notes that all those who make these statements are careful to place the habitat of these eccentric stags as far away from their own land as possible, always “somewhere in the Orient,” probably at “Nowheretown,” as he adds.[348] [Illustration: Types of _cheloniæ_ (tortoise-stones). Natural concretions. From Aldrovandi’s “Museum metallicum,” Bononiæ, 1648. ] The _chelonia_ is said by Pliny to have been the eye of the Indian tortoise. The magicians asserted that this was the most marvellous of all “stones”; for if bathed in honey and then placed in the mouth, when the moon was either full or new, it conferred the power of divination, and this power lasted for one entire day.[349] This virtue was not, however, altogether peculiar to the _chelonia_, for it was shared by several other substances; in each case the stone was to be placed in the mouth, thus coming into more immediate contact with the organs of speech, and stimulating to prophetic utterance. A later writer states that it was the uterine stone from the tortoise that gave the gift of prophecy. That from the head cured headaches and averted lightning, while the stone taken from the liver, if administered in solution, was a remedy for ague.[350]