In a pie plate, beat together 1 egg, 1/2 cup milk and some salt. Put some very fine (Indian Head brand) corn meal in another pie plate and mix with some ground pepper. Dip each cleaned soft-shell crab in the egg mixture, let drain a bit and dredge in the corn meal (on both sides). Heat a large frying pan, melt butter and fry crabs 5 to 7 minutes per side. Serve immediately.