CLASS PISCES. 421 



they have, moreover, pretty nearly the same habits as 

 the trouts, and their excellent flavour. Their stomach 

 is a very thick sac ; their gills have seven or eight 

 rays. 



Salmo thymallas, L., Bl. 24 ; has the first dorsal as 

 high as the body, and twice as long as it is high ; 

 spotted with black and sometimes with red; it is 

 brownish, and striped lengthwise with blackish. Its 

 flavour is excellent ! . 



COREGONUS, CUV., 



Have the mouth like the preceding, and still less 

 armed, for the teeth are often altogether wanting. 

 Their scales are still larger, but their dorsal is less 

 long than it is high in front. 



Europe possesses several species very similar one 

 to another. One of them, however, 



Salmo oxyrhhicus, L., Bl. 25, under the false name 

 of Lavaret, is easily distinguished by a soft pro- 

 minence at the end of the muzzle. From the north 

 sea, and the Baltic, where it pursues the shoals of 

 herrings. It is also taken in the Schelde, the lake of 

 Haarlem 2 , &c. 



1 Add Coregonus signifer, Richardson, first voy. of Captain 

 Franklin, pi. xxvi. Cor. thymalldides, Id. 



2 A bad figure of this fish sent to Rondelet (Rondel. Fluviat. 195), 

 and to which, I know not how, three dorsals had been drawn, has 

 given rise to the genus Trivteronote, Lacep., which should conse- 

 quently be suppressed. Schoenefeld had given to it erroneously the 

 name of Albula nobilis, and Artcdi and Linnaeus had confounded it 



