Drops, shaped like the frustra of cones, used principally in the architrave, and under the taenia, but sometimes also applied under the mutules of the order. Description: The guttae are also called trunnels. They appear along the underside of the regula, below the triglyphs, as six stone pegs, arranged in a single row. On the cornice they appear on the underside of the mutules, where they number eighteen, in three rows of six. The guttae of the regula correspond to the guttae of the mutule above. They represented the drops of water which distil from above, and hang in pendent drops below.