;}()4 



THE FRESH- WATER FISHES OF EUROPE. 



gravelly, and streams run tlirnuL>'li them. The flesh is reddish, and hio;hly 

 prized. The method of fishinf^ varies in different lakes. In the Lake of 

 Hallstadt the fish lie in the shadow of a mountain, and if the weather is ealm 

 and clear the fishermen follow them to their retreat, and draw their nets in the 

 day-time. The largest and heaviest specimens are caught in the colder months 

 at great depths on lines baited with small Perch, lludd, or other species of 

 Leuciscus. 



Salmo lacnstris (Willoughby). — The Lake Trout. 



D. 13, A. 11, P. 13, V. 9, C. 17. Scales : lat. line 120, trans. 20—30. 



There is a Lake Trout found in Lake Constance, which is known as Sclnreh- 

 forelle or Hilberlachs. It has the head long, low, compressed, pointed, and 



Fig-. 156. — SALMO LACUSTKIS ( WILLOUGHBY). 



Fig. lo7. — KllONT VIEW 

 OF TOMER OF SALMO 

 LACUSTRI.S. 



rather small, with a slender bod3^ The greatest height of the Ijody is always 

 equal to the length of the head, which is one-fifth of the total length. The 



eye is one-seventh of the length of the head, and twice its 



diameter from the snout (Fig, 156). 



The maxillary hone is much longer than the snout, 



strong, expanded behind, and in large fishes reaches well 

 beyond the hinder border of the orbit. The teeth are strong ; the vomer is 

 comparatively broad, with two somewhat irregular rows of teeth (Fig. 157). 

 The hinder margin of the pre-operculum is nearly parallel to that of the oper- 

 culum. The lower limb forms a very obtuse angle. The last gill-arch carries 

 seven to eight distant blunt rake-teeth, which are usually shorter than in the 

 Austrian fish known as the May Trout. 



The dorsal profile rises in a flattened arch to the dorsal fin. The ventral 

 contour is less convex. The dorsal fin begins half-way down the length, and 

 is rather longer than high. The anal fin is considerably higher than long. 



