8ALM0 IlUCIiO. 



3^9 



culai- apparatus, so that in this character it resembh'S tlic Eng-lish rather than 

 the Welsh fish. The pectoral fin is as long-, or longer than the head, and the 

 ventral is three-quarters of this length. 



The scales are larger than in other British forms. Between the dorsal fin 

 and lateral line they are nearly square, with the hind margin rounded, and those 

 of the lateral line are not larg-er than the others. Even the small scales on the 

 back are distinctly formed. Those on the sides have a silvery centre, and a 

 blackish margin. The head and back are bluish-black ; the sides and belly are 

 silvery, inclining below to a reddish tinge. There are light orange dots on the 

 sides. The hns are blackish, with a white margin to the ventral. 



Salmo hncho (Linneus). 



D. 18, A. U, P. 17, V. •)— 10, C. 11). Scales : lat. line 180. 



The River Charr of the Danube occurs nowhere else. It is sometimes 

 known as lioihjisch, but more frequently as ILnch. The Hungarians name it 

 (JaUcza (Fi,g. 103). 



Its form is elongated, slender, and somewhat cylindrical. The round body 

 and elongated form readil}' separate it from other Salmon. The height of the 



Fig. 163. — SALMO HUCHO (LINX.TiUs). 



body is only half to two-thirds of the length of the head ; and in the young 

 fish the entire length is four and a half times the length of the head. The 

 head is nearly as broad as high ; the eye is close to the frontal profile, and even 

 in young specimens its diameter is only one-seventh of the length of the head ; 

 It is twice the orbital diameter from the snout, and the same distance from the 

 other eye; though in young fish the breadth of the inter-orbital space is less. 

 The half-moon-shaped eyelid is less developed than in the May Trout and the 

 Salmon. The small nares are rather near to the eye. The gape of the mouth 

 is wide ; the maxillary bone extends behind the eye, and the bhmt-pointed 



