Combine the green pepper, onion, and celery. Remove all tendons from crab meat and flake. remove black lines from shrimp and cut in small pieces. Mix crab and shrimp and cut in small pieces. Mix crab and shrimp with vegetables. Add mayonnaise, and season with salt, pepper and Worcestershire sauce. Place in buttered ramekins or in greased baking dish. Cover top with buttered crumbs. Bake in moderate oven at 350ºF. until top is nicely browned, about 30 minutes.