I. e. descended from Pegasus or originating by him; hence Pegasis is applied to the well Hippocrene, which was called forth by the hoof of Pegasus (Mosch. iii. 78; Ov. Trist. iii. 7. 15). The Muses themselves also are sometimes called Pegasides, as well as other nymphs of wells and brooks. (Virg. Catal. 71. 2; Ov. Heroid. xv. 27; Propert. iii. 1. 19; Quint. Smyrn. iii. 301; comp. Heyne, ad Apollo. p. 301.)