BT Ber 58b(57) :מאי יותא, אמרי לה, זנב טלה ואמרי לה, רישא דעגלה‏ : what is (the star called) יותא? Some say to him "the tail of Aries" and some say "the head of Taurus"
See the entire entry for ˁĕḡel, ˁeḡlā n.m. calf