Note 830 — Chapter XII · THE WORSHIP OF MITHRAS
Reading edition
Clem. Alex. Strom. Bk V. c. 11, says Zeus is the same as Hades. He quotes Euripides as authority for the statement, but I do not know the play in which it appears. He also, op. cit. Bk V. c. 14, quotes Xenocrates as saying that there is an “Upper and Lower” Zeus.