Jaya Gouranga Dasa : That's me playing a mridanga, right behind Srila Prabhupada's lotus head (I'm wearing a yellow kurta). I had the wonderful opportunity to travel with Srila Prabhupada to Mexico, February 1975. Paramahamsa Swami is playing the other mridanga which I brought with me to Mexico. It was a mridanga that originally belonged to Srila Prabhupada. I bought it from a devotee in Los Angeles named Amritananda Dasa, who got it from one of Srila Prabhupada's personal servants, Srutakirti.
Also in the picture you can see Srutakirti, Hridayananda Swami, Hanuman Dasa and Nitai (Prabhupada's Sanskrit editor) amongst others.