TION. 



422 GWYNIAD SALMON. Class IV. 



by accident the first have been known to stray- 

 as far as Llandrillo, six miles down the river, 

 and a salmon has now and then been found 

 trespassing in the lake.* 



The largest Gwyniad we ever heard of weigh- 

 ed between three and four pounds : we have a 

 Ferra we brought with us out of Szviizerland, 

 that is fifteen inches long; but these are un- 

 common sizes : the fish which we describe was 

 eleven inches long, its greatest depth three. 

 Descrip- The head is small, smooth, and of a dusky 

 hue ; the eyes very large ; the pupil of a deep 

 blue; the nose blunt at the end; the jaws of 

 equal length ; the mouth small and toothless ; 

 the branchiostegous rays nine; the covers of 

 the gills silvery, powdered with black ; the 

 back is a little arched, and slightly carinated ; 

 the color, as far as the lateral line, glossed with 

 deep blue and purple, but towards the lines 

 assumes a silvery cast, tinged with gold, be- 

 neath which those colors entirely prevale; the 

 side line is quite strait, and consists of a series 

 of distinct spots of a dusky hue ; the belly is a 

 little prominent, and quite flat on the bottom. 

 The first dorsal fin is placed almost in the 

 middle, and consists of fourteen branched rays; 



* Hon. D. Barrington's Letter to Dr. Watson. Phil. Trans. 

 I/67. 



