published in 1574.  The two brothers are probably the latest composers who handled 16th-century music as their mother-language; suffering neither from the temptation to indulge even in such mild neologisms as they might have learnt from the elder brother’s master, Nanino, nor from the necessity of preserving their purity of style by a mortified negative asceticism.  They wrote pure polyphony because they understood it and loved it, and hence their work lives, as neither the progressive work of their own day nor the reactionary work of their imitators could live.  The 12-part Stabat Mater in the seventh volume of Palestrina’s complete works has been by some authorities ascribed to Felice Anerio.

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ANET, a town of northern France, in the department of Eure-et-Loir, situated between the rivers Eure and Vegre, 10 m.  N.E. of Dreux by rail.  Pop. (1906) 1324.  It possesses the remains of a magnificent castle, built in the middle of the 16th century by Henry II. for Diana of Poitiers.  Near it is the plain of Ivry, where Henry IV. defeated the armies of the League in 1590.

ANEURIN, or ANEIRIN, the name of an early 7th-century British (Welsh) bard, who has been taken by Thomas Stephens (1821-1875), the editor and translator of Aneurin’s principal epic poem Gododin, for a son of Gildas, the historian. Gododin is an account of the British defeat (603) by the Saxons at Cattraeth (identified by Stephens with Dawstane in Liddesdale), where Aneurin is said to have been taken prisoner; but the poem is very obscure and is differently interpreted.  It was translated and edited by W.F.  Skene in his Four Ancient Books of Wales (1866), and Stephens’ version was published by the Cymmrodorion Society in 1888.  See CELT:  Literature (Welsh).

ANEURYSM, or ANEURISM (from Gr. [Greek:  aneurisma], a dilatation), a cavity or sac which communicates with the interior of an artery and contains blood.  The walls of the cavity are formed either of the dilated artery or of the tissues around that vessel.  The dilatation of the artery is due to a local weakness, the result of disease or injury.  The commonest cause is chronic inflammation of the inner coats of the artery.  The breaking of a bottle or glass in the hand is apt to cut through the outermost coat of the artery at the wrist (radial) and thus to cause a local weakening of the tube which is gradually followed by dilatation.  Also when an artery is wounded and the wound in the skin and superficial structures heals, the blood may escape in to the tissues, displacing them, and by its pressure causing them to condense and form the sac-wall.  The coats of an artery, when diseased, may be torn by a severe strain, the blood escaping into the condensed tissues which thus form the aneurysmal sac.