In another bowl, sift together the flour and baking powder.
Season the cleaned crabs with salt and a generous amount of pepper.
Dip crabs thoroughly in the egg mixture, then in the flour mixture. Set aside.
Pour vegetable oil into a fry pan to about 1" deep. Heat to very hot.
Cook crabs until golden brown, turning once, about 4-5 minutes on each side. Drain on paper toweling.
Cut the toasted French bread into four pieces. Dress the bread of each sandwich with mayonnaise, lettuce and a couple slices of tomatoes. Place the two crabs inside each sandwich and season with a dash or two of hot sauce.