Season chicken with salt and pepper. Combine remaining spices and stir into butter. Place chicken on broiler rack in a shallow pan. Using a pastry brush, spread some of the butter mixture  over chicken. Brown in broiler, brushing frequently with butter mixture. Turn pieces as they brown. When all pieces have browned, remove to a roaster. Pour juices from the broiler pan, along with  the orange juice, over the chicken. Bake, covered, at 275ºF.  for 1 hour. Remove from roaster to serving dish. Thicken the juices slightly. Pour over chicken. Garnish with parsley sprigs and orange slices. Serves 8.