Identifier: historyoffisheso04couch (find matches)
Title: A history of the fishes of the British Islands
Year: 1862 (1860s)
Authors: Couch, Jonathan, 1789-1870 Lydon, A. F
Subjects: Fishes
Publisher: London, Groombridge and Sons
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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hat time the numbers have fallen greatly short, inconsequence, as was supposed, of a flow into the lake of thewater of a copper mine, which was believed to have destroyedthe whole of them. This, however, is a mistake, since theyare still obtained in some abundance; and not in this lakeonly, but also in Llyn Cwyllean, situated in a deep valley onthe west side of Snowdon. They come up out of their greaterdepths in the depth of winter, and when the weather is atthe coldest they sport in the shallower water close to theborder, but soon again retire to their former haunts. Theyare taken with a worm, and sometimes are known to rise toa fly. The body is compressed and lengthened; length of thehead considerably more than one half of the distance from thesnout to the line of the origin of the dorsal fin; upper profileof the head not elevated above the margin of the orbit, andis not even slightly ridged, but slightly concave; the medianridge scarcely visible. Snout rather depressed, the lower a
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- o - o TOnGUClI OF LLANBERRIS. 2G5 little curved upward and over-reaclriug the upper. Nostrilsmidway between the eyeball and end of the snout, the foremostround, open, surrounded by a membrane which posteriorly isdeveloped into a small flap, which does not exist in the Charof Windermere, and in this species almost entirely covers thesmaller, oblong, posterior nostril. By this character alone theTorgoch may be distinguished from the last-named species andthe Char of Lake Melvin. The mystache scarcely extendsbeyond the hindmost border of the eye, and has from nineteento twenty-one teeth, six or seven in each intermaxillary,seventeen in each mandible, seven on the vomer (where theyform two sides of a triangle,) fifteen on each palatine bone,and five pairs on the tongue. Origin of the dorsal fin a littlenearer the snout than to the root of the tail, with thirteen orfourteen rays, the first very small, the sixth longest. Analfin with eleven or twelve rays, the first exactly in the middleb

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