The Bulla—The Tusk—Pine Cone—The Frog—Skull of an Ass—Key Talismans—Grylli, or Chimeræ—Goat—The Ox—Lion—Eagle—The Caduceus—Mercury—Health Rings—Boar's Head—Clenched Hand—Open Hand—Figured Hands—The Lizard—The Spider—The Fish—Snails. Bulla is the name given to a gold case, circular or heart-shaped, used in necklaces or worn separately as a pendant, sometimes attached as an ornament to a belt or badge which was placed over one shoulder and under the opposite arm. Macrobius says it was the special…