[6] Stone implements were used for common purposes, especially for sickles to cut heads of corn, down to a comparatively late period, but as Spurrell observes in Petrie's, _Illahun Kahun and Gurob_, "these implements do not represent work of the stone age properly considered." They are not so much survivals of neolithic forms, as imitations, in the cheaper material of flint, of metallic forms for rough work and common use. The use of a flint knife for making the first incision on the corpse in preparing it for a mummy, is the only fact which looks like a survival from neolithic into historical times. The disappearance of all historical recollections of a stone age is paralleled by the oblivion of the origin of the remains of the great extinct quaternary animals which were contemporary with man. Everywhere we find the fossil bones of the elephant and rhinoceros attributed to monsters and giants, both in the ancient and modern worlds. St. Augustine denounces infidels who do not believe that "men's bodies were formerly much greater than now," and quotes, in proof of the assertion, that he had seen himself "so huge a molar tooth of a man, that it would cut up into a hundred teeth of ordinary men,"--doubtless the molar of a fossil elephant. Marcus Scaurus brought to Rome from Joppa the bones of the monster who was to have devoured Andromeda. The Chinese Encyclopædia, already referred to, describes the "Fon-shu, an animal which dwells in the extreme cold on the coast of the Northern Sea, which resembles a rat in shape, but is as big as an elephant, and lives in dark caverns, ever shunning the light. There is got from it an ivory as white as that of an elephant;" evidently referring to the frozen mammoths found in Siberia. Similar circumstances gave rise to the same myth in South America, and the natives told Darwin that the skeletons of the mastodon on the banks of the Parana were those of a huge burrowing animal, like the bizchaca or prairie-rat. Numerous similar instances are given by Tyler in his _Early History of Mankind_, and among the whole multitude of this class of myths, there is only one which has the least semblance of being derived from actual tradition, viz. the bas-relief of the sacrifice of a human victim by a Mexican priest, who wears a mask of an animal with a trunk resembling an elephant or mastodon; and certain vague traditions among some of the Red Indian tribes speak of an animal with an arm protruding from its shoulder. It is more probable, however, that these may have been derived from traditions brought over from Asia like the Mexican Calendar, or be creations of the fancy, like dragons and griffins, inspired by some idea of an exaggerated tapir, than that, in this solitary instance, a Mexican priest should have been actually a contemporary of the mammoth or mastodon.