pallet tail (palettal)

In clockwork, one of the rocking arms or extensions which connect the pallets engaging the teeth of an anchor-escapement and some other kinds of escapements with the arbor on which the arms oscillate. pallia, n. Plural of pallium. pallial (pal'i-al), a. [ See cut under Tridacnida. - Pallial impre ion, pallial line, the impre ion, line, or mark made by the mantle-margin on the inner surface of the shell of a bivalve mollusk. According to the continuity or interruption of this line, or rather of the structure of the mantle which impre es this difference, bivalves are called integropalliate or sinupalliate. See cuts under bivalve, dimyarian, Ga dinia, integropalliate, and Trigoniidæ. - Pallial shell, a shell which is secreted by or contained within the mantle, such as the bone of the cuttlefish. - Pallial sinus, a sinus or rece in the pallial impre ion of sinupalliate mollusks. It is the siphonal impre ion, or mark of the retractile siphons which many bivalves po e , and thus affords a zoological character. See sinupalliate, and cuts under bi valve and dimyarian.