538 TEN FEARS IN SWEDEN. 



nosis of this S. salvelinus t or " Wetterns roding," is : Cf nose 

 more pointed ; head longer ; fins longer, and colour not so 

 dark as in the common charr." This form or variety is, I 

 believe, only found in two Swedish lakes, the Wetter, and 

 in the south of the Sommen. It grows to a large size, often 

 to 12 lb., sometimes to 15 Ib. (but I never saw one nearly so 

 large, and I do not consider the size as having anything to 

 do with determining the species, because I am certain in 

 many Scandinavian lakes the common charr runs to 10 or 

 12 lb.). Even of this 8. salvelinus there appear to be two 

 forms the one they call the ' ' livree roding," which, accord- 

 ing to Nilsson, never goes out of the lake into rivers which 

 fall into it (by this it would appear that the other form is 

 partially migratory-) ; spawns throughout the whole of Oc- 

 tober on a stony or sandy bottom, in a depth of about a 

 fathom. The flesh of this "livree roding" is red, fat, and well 

 tasted. The other form, which they call the " blank rodin- 

 gen," spawns at the same time, but always on a muddy or 

 clayey bottom, in thirty to forty fathoms. This is smaller 

 than the other, and the flesh is white and poor. 



The fin ray formula in the 8. salvelinus , carefully reckoned 

 in many species, was as follows : D. 13 ; P. 13 ; V. 9 ; A. 

 12; C. 19 8,7; scales on the lateral line, according to 

 Nilsson, are 120. This does not at all agree with Dr. 

 Gunther. 



Nilsson gives us two other varieties of the charr, 8. 

 carbonarius, Strom, and 8. rutilus, Nilss, both peculiar to 

 some lakes in south-west Norway, which are, however, 

 clearly nothing more than varieties in colour of the common 

 charr, 8. alpinus, L. 



G-en. Osmerus } Art. 



This genus is distinguished by the transparent body 

 (having a peculiar cucumber like scent) ; thin scales ; large 

 eye ; projecting lower jaw, and adipose fin placed over 

 the front division of the anal fin ; small fish, rarely exceeding 

 one foot in length ; habits like the salmon, but in Scandinavia 

 they principally live in fresh water during the whole year. 



