In flavour, delicacy, and size, the Severn shad is superior to those frequenting the Thames ; they genera, ly appear in the. month of April or May; and remain about two months.
Targe quantities of these fish are taken by nets, in the vicinity of Gloucester, whence they are sen to the London, markets, and sold. at a higher price than salmon. - • The fishmongers distinguish this, shad from that of the Thames, by the French name, alose.
There is a variety, of the shad called the twaite; great numbers of which are taken in the Severn, weighing from half a pound to 2lbs. and possessing no better, flavour than th in the
Thames, - The twaite differs from the shad in its external characters, by having one or more round black, spots on the sides; and generally three or four, situated one under the other, near the gills.
The shad of the Thames visits that river about the latter end of May, or early in June. Its flesh is very coarse and insipid ; so that it affords improper food for those, whose organs of digestion are weak or impaired.