Hircocervus

This is a woodcut is of the tragelaph from the book, The History of Four-footed Beasts and Serpents by Edward Topsell.

The hircocervus (Latin: hircus, "billy goat" + cervus, "stag") or tragelaph (Greek: τράγος, romanizedtragos, "billy goat" + έλαφος, elaphos, "stag"), also known as a goat-stag, was a legendary creature imagined to be half-goat, half-stag.