COMPARISON OF ESTTJAKY TROUT WITH OTHERS. 31 



The vertebrae are 60 ; floating ribs on either side 32 = 64. The 

 peculiar parasitical insect which the salmon brings with him from 

 the sea, is found on these trout. Here is a table, contrasting the 

 Estuary trout with the common Tweed trout, and with the beau- 

 tiful trout of Loch Leven. 



Tweed Trout. Estuary Trout. Leven Trout. 

 Inches. Inches. Inches. 



Total length 12| 12 12$ 



Length of head .... 31 2-f 2| 



Gape If ... If 



From snout to the eye . 1 | -f 



Snout to pectoral fin . . 3 2-f 2| 



Pectoralfin If If If 



Snout to dorsal fin ..." 5-f 51 4f 



Snout to mort fin ... 9 9| 9 



Snout to pelvic fin ... 6J 5f 5-| 



Ditto to anal fin .... Sf Sf 8f 



Breadth of tail . . . . 2f 4 3f 



Snout to end of maxillary bone If 1^ If 



A glance at this table will show that the masticatory and 

 respiratory organs of the Tweed trout are stronger than either 

 those of the Leven or the estuary ; whilst on the other hand, the 

 breadth of tail indicates more power of action in the Leven trout.* 



I have already mentioned that this trout is not afraid of 

 repairing to salt waters ; a friend of mine saw two taken at sea 

 off the Kyle of Bute ; these I examined ; and Mr. Murray, of 

 Henderland, informed me that, off Strachur, in Loch Fine, a 

 trout, corresponding with the one I am now describing, was 

 caught in a net. The teeth in all amount to a hundred and fifty. 

 Let this suffice here for the natural history of a trout which 

 the angler may meet, with, and perhaps even take .with an 

 angle, although I never did. But although he may not be 

 induced to angle for it, it seems right that the angler should 

 know something about the finny tribe, and especially about so 

 fine a trout as the one I have just described. Knowledge is a 



* These tables and remarks are copied from some MS. Memoirs. 



