Clysma (Κλῦσμα), the name given by Eusebius (Onomast. s.v. Βεελσεφών) to the head of the Heroopolitan or western gulf of the Red Sea, through which the Israelites passed on dry land; according to Philostorgius (Hist. Eccl. 3, 5), from a town of that name (comp. Epiphanius, adv. Haer. 2, p. 618), apparently corresponding nearly to the modern site of Suez (Reland, Palaest. p. 471), a little to the north of which are some mounds still known by the Arabs as Tell Kolzum (Wilson, Lands of Bible, 1, 137). SEE EXODE.