appellation given to several muscles, from their extending or stretching the parts to which they belong. See Anatomy, Part II.

Old and new Extent, in Scots law. The old extent was a valuation or estimate of the annual value of all the lands in Scotland, taken (it is thought before the reign of Alexander III.) for the purpose of proportioning the public subsidies, and ascertaining the rates of certain feudal casualties. By improvement, and the alteration in the nominal value of money, this valuation, or old extent, became, in length of time, too low a standard for computing their feudal casualties; wherefore, about the reign of Robert I., all inquests for serving heirs were ordained to take proof also of the present value of the lands contained in the brief. This last was called the new extent. See Scots Law, title 12.—None of these extents is the rule by which the land-tax is now proportioned in Scotland. See Valuation, or Valued Rent.

Exterior, or External. See External.