548 TEN YEAKS IN SWEDEN. 



of Sweden, where it remains all the year. It is also pro- 

 bably a native of other Scandinavian lakes, for Valenciennes 

 has even obtained specimens from Norway. 



They spawn in November, and the spawning season 

 lasts till the middle of January. 



Of Widigren's 0. fera, Jur., Malmgren appears to make 

 a new species, which he calls 0. widigreni, G. fera, Wid.; 

 and he says : " From 0. marcena, which it otherwise much 

 resembles, this species differs on account of its longer 

 head, its more slender form of body, and the different 

 shape of the nose, its smaller size, and later spawning 

 season (end of November and December). The head, as 

 well as the body, is more lengthy in proportion, but not so 

 " spool " shaped as in G. lavaretus, but reaches its greater 

 height at the back of the head ; the nose, seen from the 

 side, appears triangular ; scales on the lateral line 90 ; usual 

 size 1 to 3 lb." 



He refers to G. fera, Wid. (nee Jurine), Wid. 1862, Fab. 

 18, p. 64. 



Now there seems some discrepancy here. I have before 

 me Widigren's " Bidrag till kannedom om Sveriges Sal- 

 monider," in the " Ofversigt of Kong vet Akad, Forhand " 

 for February 1862, and here he certainly notices only the 

 five species which I have mentioned above, nor can I see 

 any thing in his description there which leads me to sup- 

 pose that the fish which he describes as G. fera, Jur., and 

 to which he gives the synonyme of C. Marcena, Bl., and the 

 Swedish name of " knubb sik," is meant by him to be con- 

 sidered as a new species, or anything more than the (7. 

 marcena, Bloch, as described by Mr. Lloyd ; for he gives 

 it the Wener name of the "lof sik" as well as " knubb sik," 

 and except as regards the spawning season, both their de- 

 scriptions of this fish seem to agree, especially as regards 

 the eye, one of Mr. Lloyd's chief marks of distinction. So 

 whatever they may consider in Finland, I think no natura- 

 list here wishes to make G. fera, as described by Widigren, 

 a new species, or anything more than the common ' ' lof sik," 

 of the Wener. 



