Clothing of the Dead
According to the Roman Ritual the corpses of clerics should be dressed in ordinary ecclesiastical costume, over which should be put the vestments distinctive of their order.
Thus a bishop or priest has the amice, alb, girdle, maniple, stole, chasuble, and biretta; the deacon has his dalmatic and stole; the subdeacon his tunicle; and the cleric his surplice.
No special dress is required for the laity, but the corpse should be decently laid out and it is customary to place a rosary, crucifix, or other pious article in the hands of the deceased.
New Catholic Dictionary