. British and Irish Salmonidæ. —SEWIN, ITS DESCRIPTION. 163 teeth alternately directed to the right and to the left, and siibseqxiently theydrop out, commencing from behind. But the age when this occui-s varies,as will be seen in figure 35, where a sewin 15-1 inches long still possessed four along the body of thevomer, while it is byno means infrequent forexamples of similar size toretain even more. Occa-sionally two or threeremain across the hindmargin of the head of thevomer in examples fromten to fifteen inches inlength. The teeth in thejaws and palatines aresimilar to those seen inthe salm
. British and Irish Salmonidæ. —SEWIN, ITS DESCRIPTION. 163 teeth alternately directed to the right and to the left, and siibseqxiently theydrop out, commencing from behind. But the age when this occui-s varies,as will be seen in figure 35, where a sewin 15-1 inches long still possessed four along the body of thevomer, while it is byno means infrequent forexamples of similar size toretain even more. Occa-sionally two or threeremain across the hindmargin of the head of thevomer in examples fromten to fifteen inches inlength. The teeth in thejaws and palatines aresimilar to those seen inthe salmon-trout. Fins- Fig. on vomer of seuiii 6-8 inches long :From sewin 15-1 inches long. It has been stated thatexamples of this fish, re-tained some considerabletime in a fresh-water pond,had their pectorals morepointed and longer thanis usual in their sea-going relatives. The analfin, similar to that foundin the more northernrace of sea trout, mayhave a variation in thenumber of its rays, whichconsist of two descrip-.
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Keywords: ., bookcentury1800, bookdecade1880, bookidbritishirish, bookyear1887
