Soak whole ears of corn in large bowl of lightly salted water. Mix together butter with spices. Finely grate the peel of lime and mix with butter spread. Carefully pull down husks from corn and remove silk from the ears. Spread each ear with 1 T of butter.
Reserve remaining butter spread for use at the table. Replace enough husks to protect corn with 2 to 3 layers of husks. Remove remainder. Grill over moderate coals for 15 to 20 minutes.