Remove all cartilage from crabmeat. In a bowl, mix bread crumbs, egg, mayonnaise and seasonings. Add crabmeat and mix gently but thoroughly.
Do not break crab lumps.
If mixture is too dry, add a little more mayonnaise. Shape into 4 crab cakes.
Cook cakes in frying pan with just enough butter to prevent sticking. Brown on both sides about 5 minutes per side.
The mayonnaise, pimiento and remaining seasoning may be stirred together and refrigerated in advance of preparation. In fact, this will allow the flavors to develop nicely.