SALMO HARDINII. 281 



The fish prefers a gravelly bottom. It reaches a length of twenty-nine 

 inches in Lough Earne, and is said to spawn in November, though Dr. 

 Giinther has some doubt whether this large fish belongs to the same species 

 as the smaller fish from Lough Melvin. The teeth on the vomer are in a 

 double series, and are persistent throughout life. The fins are well developed, 

 and the pectoral is pointed. 



According to Mr. Day, the Trout of Swaledale has a thickened stomach 

 like the Gillaroo, and thirty-five pyloric appendages. 



In all probability many varieties of Trout remain to be described, for when 

 taken by fishermen the internal anatomy is not always observed, nor are the 

 technical variations of fin, scale, colour, and proportions always recorded. 

 And a better knowledge of these intermediate forms is likely to show that 

 several types, which resemble each other in fin rays and scaling, to which 

 names are here given, should be grouped together, as we have grouped many 

 Carp, as geographical varieties of a few species. 



Salmo hardinii (GUNTHER). 



D. 15, A. 12, P. 14, V. 910. Scales : lat. line 122, trans. 2230. 



The Silfver lax, or Silver Salmon, of Sweden, is recorded from Lake 

 Wener and the River Gotha. Mr. Lloyd mentions that it is a splendid fish 

 in appearance, and though the flesh is of a paler colour, is held in nearly the 

 same estimation as Salmon. He found it always in the finest possible 

 condition, even in early spring, when it is chiefly taken. The common weight 

 is seven to nine pounds, but it occasionally weighs as much as fourteen pounds. 

 There are specimens in the British Museum twenty-three inches long. It 

 ascends the rivers which flow into Lake Wener, to spawn. 



The colour of the back is greenish, the sides and belly are bright silver, with 

 some scattered black spots on the head, body, and dorsal fin. The pre-operculum 

 has a distinct inferior limb. The maxillary bone is strong, and extends 

 behind the orbit. The head of the vomer is toothless, but its body carries a 

 few teeth in a single series. The caudal fin is deeply emarginate. -Thirteen 

 scales descend in a transverse series obliquely forward, from behind the adipose 

 fin to the lateral line. 



It is said to have a peculiar habit of jagging the line when hooked. Mr. 

 Lloyd suggests that it may originally have been a Sea Trout, which has become 

 cut off from the sea. 



