Wrap a scallop in a basil leal and thread onto a 6-inch skewer.
Wrap a shrimp with a seallion top and add to the skewer.
Follow with another basil-wrapped scallop and a scallion-top-wrapped shrimp and a third basil-scallop.
Prepare remaining scallops and shrimp in this manner and thread onto remaining skewers.
Combine butter and beer and brush generously over skewers.
Sprinkle with salt and pepper.
Lay skewers on a grill about 3 inches from hot coals and grill for about 5 minutes on each side, or until fish is just cooked through: Do not overcook, as scallops will become leathery.