1. 8ALM0. 



105 



which he regards as a descendant of S. salar, naming it Trutta 

 relicta. This is probably a distinct species; but the author has 

 omitted to point out its characters, except one, viz. that the ova of 

 Tnitta relicta are considerably smaller than those of the Salmon. 



After these preliminarj- remarks, we proceed to give descriptions 

 of those of the Scandinavian species which we were enabled to di- 

 stinguish among the specimens in the British Museum Collection, and 

 which, for the present, we must consider to be peculiar to that 

 peninsula. Others, common to other parts of Europe, have been 

 mentioned above. There is no doubt that more forms will be found 

 '*in that country ; and we have several examples which we cannot 

 refer to any of the known species, but the description of which must 

 be deferred until the specific characters can be better defined by the 

 examination of a greater number of examples. 



24. Salmo mistops. 



Female, 17 inches long. Nat. size. 



B. 11-12. D. 14. A. 12. P. 14. V. 9. L. lat. 118. L. transv. 26/34. 

 Vert. 59-60. Cjec. pyl. 43-52. 



Head small, convex above, with the snout of moderate length, and 

 much pointed. Operculum and suboperculum of moderate width and 

 depth ; praeoperculum with the lower limb rounded. Eye extremeJy 

 small*. The posterior point of junction of operculum and suboper- 



* Its diameter is 6 Unes in a specimen 17 inches long, 5 lines in one of 15 inches, 

 and 4^ lines in one of 12 inches. 



