224 NATURAL HISTORY [Fishes. 



Species 5. — The Char. 

 Wil. Icth. 196. Rati Syn. Pise. 65. Un. Sys. 510. Brit. Zool. 256,pl 15. 



Very infrequent with us, though sometimes seen in the 

 loch of Stenness. I have not seen above a couple of speci- 

 mens. Perhaps we know not the method of catching them, 

 or the season may differ here from other places where they are 

 found. However this is, they are not much known. 



It is the beautiful red on the belly Avhich distinguishes them 

 from the other trout of the loch, and is a sufficient mark to 

 strike the most inattentive observer. 



Species 6. — The Grayling. 



A Grayling or Umber, Wil. Icth. 187. Raii Syn. Pise. 62. Salmo Thymal- 

 lus, Lin. Sys. 5 12. Brit Zool. 262. 



This species is found very frequent with us ; caught with 

 a fly, to which it rises very freely, and struggles hard for life. 

 Swims very quick ; leaps much, especially when struck with 

 a hook, when the nicest hand is required to hinder its break- 

 ing the line, nor is it easily tired. 



This species is caught of different sizes, from a foot to 

 eighteen inches long. 



