In a large saucepan, saute onion and celery in butter. Stir in the flour, seafood seasoning, salt, pepper and nutmeg until blended; gradually add water and bouillon. Bring to a boil; cook and stir for 2 minutes or until thickened. Stir in potatoes. Reduce heat; simmer, uncovered, for 10 minutes., Add asparagus; cook 8-12 minutes longer or until vegetables are tender. Stir in the cream, crab and parsley; heat through. If desired, top with chopped parsley and coarse cracked pepper.