Rav Huna, the son of Rav Oya, said to Rabbi Elazar: "In Chulin (Mishnah 47a), but in Niddah (58b) it is stated that there is Bar Chiyya." Rav Ashi said: "I saw in a dream Rav Huna, the son of Rav Oya, in Bava Batra (Kiddushin 143a), as mentioned above, Rav Mordechai."
Seder_HaDorot,_Tanaim_and_Amoraim.994:1