APPENDIX. 201 



sides and the belly of a beautiful silvery white, 

 from which its name of whitling is derived. Nine 

 rays on the anal fin. In the rivers on the borders of 

 Scotland they are sometimes caught from sixteen to 

 twenty inches long, and weighing from two to four 

 pounds. In the Tay they are seldom caught ex- 

 ceeding twelve inches. It enters the rivers about 

 July, and is found with the sea-louse adhering to it 

 the same as the salmon. The flesh is of a reddish 

 color like that of the salmon. 



6. Salmo Fario. The common trout. Color of 

 the back a dusky brown ; of a greenish yellow on 

 the sides ; white on the belly. Marked with many 

 spots of a brown, red, and purplish hue. Edges of 

 the ventral fins of a red or yellowish tinge. Rays 

 in the anal fin, nine. Does not go down to the sea. 

 Mostly taken from ten to fourteen inches long, and 

 weighing from eight ounces to a pound. Many are, 

 however, caught of a much greater size. One taken 

 in the neighbourhood of Great Driffield, in Septem- 

 ber, 1832, measured thirty-one inches in length, 

 twenty-one in girth, and weighed seventeen pounds. 

 The age to which the trout arrives has n^ver been 

 ascertained, any more than the age of the salmon. 

 In August, 1809, a trout died, which had been for 

 twenty-eight years an inhabitant of the well at 

 Dumbarton Castle. It had never increased in 

 weight from the time of its being put in, when it 

 weighed about a pound ; and had become so tame 

 that it would receive its food from the hands of the 

 soldiers. 



In the river Eynion in Cardiganshire, there is a 

 kind of trout taken with the back crooked immedi- 



