Whip the cream cheese and cream until smooth. Beat in the mayonnaise; add the onion, chives, garlic and salt. Blend all well. Pick over the crab meat and marinate in the lemon juice while finishing sauce. Spread on salted crackers or toast. Place in broiler pan and broil until brown and bubbly. This mixture may also be served as a cold dip. Yields about 2 cups.