THE SALMON FAMILY. 309 



but it occasionally happens, especially when confined for a 

 long time in a loch, that the Sea-Trout acquires a colour 

 not altogether unlike that of the Yellow Trout ; and when 

 this is the case, a reference to the teeth on the vomer or 

 central bone on the roof of the mouth will always settle the 

 point. 



These teeth in the common Trout (and also in the Great 

 Lake Trout) run in two distinct rows, whilst in the Sea- 

 Trout they run only in a single row. It is to be observed, 

 however, that the arrangements of the teeth require to be 

 rather closely examined, as in the case of the Sea-Trout 

 the points bend alternately to either side, so as to present 

 rather the appearance of a thinly planted double row; 

 whilst in the common Trout the two lines of teeth are 

 placed so that a space in one row has a tooth opposite it in 

 the other, making the difference appear at first sight to be 

 little more than one of comparative closeness in the setting 

 of the teeth. In regard to the position of these vomerine 

 teeth, the engraving of the mouth of the common Trout 

 at p. 35 is somewhat inaccurate, resembling in fact more 

 nearly the appearance of the single row seen in the mouth 

 of the Sea-Trout. 



Great quantities of the Sea- Trout are yearly sent from 

 Scotland to supply the London markets, where they ob- 

 tain a high price. Those from Perth, Dundee, Montrose, 

 and Aberdeen are considered to be the best fed, as well 

 as of the finest flavour and colour, — the Tweed producing 

 comparatively few. In regard to the latter river. Lord 



