Ca`la*ve"ras skull (?).
A human skull reported, by
Prof. J.D. Whitney, as found in 1886 in a Tertiary auriferous gravel
deposit, lying below a bed of black lava, in Calaveras County,
California. It is regarded as very doubtful whether the skull really
belonged to the deposit in which it was found. If it did, it indicates
an unprecedented antiquity for human beings of an advanced
© Webster 1913.