SAL3ION TROUT. 81 



tiful little fish, resembling much a small Salmon-Trout, and 

 if not a young Salmon-Trout, I know not what they are. 

 When caught, the scales, which are of a beautiful silvery 

 whiteness, separate so easily from the fish, that on taking 

 it up they stick to the hand, leaving almost the impression 

 behind. The flesh pink-coloured, and the flavour very 

 good." 



Dr. Mac Culloch states, that " the Salmon-Trout, or Sea 

 Trout, as it is called in Scotland, is now a permanent 

 resident in a fresh-water lake in the island of Lismore, 

 one of the Hebrides, and without the power of leaving 

 it or reaching the sea. There it has been known for a long 

 course of years, perfectly reconciled to its prison, and pro- 

 pagating without any apparent difficulty."* 



The length of the head is, when compared with the length 

 of the body alone, as one to four ; the depth of the body 

 compared to the whole length of the fish is also as one 

 to four : the teeth small and numerous, occupying five 

 rows on the upper surface of the mouth ; those of the cen- 

 tral row on the vomer extending some distance along it, 

 the points turning outwards alternately to each side ; one 

 row upon each side of the under jaw, and three or four 

 teeth on each side of the tongue, strong, sharp, and curving 

 backwards, well calculated to assist in holding a living 

 prey, or to convey food towards the pharynx : the middle 

 of the eye situated half- way between the point of the nose 

 and the posterior edge of the preoperculum : the form of 

 the parts of the gill-cover have been already described and 

 figured. The first ray of the dorsal fin is short ; the second 

 ray long, equal to the length of the base of the fin ; the 

 articulation at the base of the last dorsal fin-ray exactly 

 half-way between the point of the nose and the end of the 

 tail ; the fleshy fin on the back being also half-way between 



* Journal of the Royal Institution, No. xxxiv. p. 211. 

 VOL. II. G 



