The army which guarded or coerced the province consisted, from the time of Hadrian onwards, of (I) three legions, the Second at Isca Silurum (Caerleon-on-Usk, q.v.), the Ninth at Eburacum (q.v.; now York), the Twentieth at Deva (q.v.; now Chester), a total of some 15,000 heavy infantry; and (2) a large but uncertain number of auxiliaries, troops of the second grade, organized in infantry cohorts or cavalry alae, each 500 or 1000 strong, and posted in castella nearer the frontiers than the legions.
As a young commander of cavalry (praefectus alae) he wrote in his winter-quarters a work on the use of missiles on horseback (de jaculatione equestri), with some account of the points of a good horse (viii.
The larynx has the lateral sacculi well developed, though entirely concealed within the alae of the thyroid cartilage.
I and 2, The alae or wings.
40), in which there are five petals: - one superior (posterior), st, placed next to the axis, usually larger than the rest, called the vexillum or standard; two lateral, a, the alae or wings; two inferior (anterior), partially or completely covered by the alae, and often united slightly by their lower margins, so as to form a single keel-like piece, car, called carin g, or keel, which embraces the essential organs.