358 On the Natural History of the Salmon^ 
of grilses as salmon as we do in others ^ for instance, in our fishing at the 
Foyle, it consists ahiiost entirely of grilse;” p. ilO. When they first appear 
in the rivers, they are from to 3 lb. in weight, and they increase gradual- 
ly every week during the time we kill them.” At the end of the season they 
weigh “ 8, 9, or 10 lb.” He likewise states, “ Our water keepers tell me that 
they very seldom see a salmon and grilse breeding together^ but they have seen 
it occasionally, but not generally ; very seldom ;” p. 113. There can be little 
doubt, that the term Grilse is used in general to denote a young salmon, 
though the same epithet is probably bestowed upon a distinct species of the 
genus likilmo, with which it seems to be confounded. 
III. Trout.— Sir H. Davy considers Salmon-peal, Sewen, and Bull-trout, 
as constituting one species, the Salmo Eriox of Linnaeus, the most correct ap.» 
pellation of which is Sea-^trout. The Salmo Trutta of Linnoeus, however, has 
been universally regarded by British systematical writers as the common <S'm- 
trout; and the Salmo Eriox is a very different speries. The term Erioos^ as 
first employed by Albertus Magnus in the thirteenth, and by Cuba in the 
fifteenth century, was considered by Artedi as referring to the Common Sal- 
mon ! Linnseus afterwards emploj^ed the term as a trivial name to the “ S. 
maculis cinereis, cauda extreme lequali” of Artedi, and the Gray of Willugh- 
by and Bay. De Lacepede continues the term in its Linnean sense ; and, we 
may add for the information of the learned chemist, that S. Trutta and S. 
Eriox are both well characterised species and natives of Great Britain. Let 
him count the rays of the giihflap if he doubts. Mr Johnston says, “Al- 
though in some friths and rivers, where there are a great many salmon, there 
are also great numbers of trout; yet in others, where there are a great 
many salmon, there are very few trout ;” p. 38. Mr Halliday states, “ In 
the Annan I have known us get more sea-trouts in one day, than we shall 
get in the Tay in a whole year ;” p. 64. Mr Little declares, “ that the sea- 
trout are not found in all salmon rivers. We do not see any thing like the 
Spey trout, or like the trout that is caught in the Solway Frith, or like the 
trout that is caught in the Tweed, in any of our fishings in Ireland. They 
do not breed, nor are they to be seen there;” p. 111. Sir H. Davy states, 
that “ the different habits of the salmon and sea-trout are v/ell demonstrat- 
ed in the Moy, near Ballena in Ireland,” on which there is a large pile near 
the town, and which, below the fall, is joined by a considerable stream. “ The 
salmon leap this fall ; the sea-trout almost all spawn in the smaller stream, 
a few miles from the sea;” p. 144. There is some strange blunder here. 
Mr Little, the tenant of the fishings on the Moy, says, there are trout, “ but 
not the trout called the Sea-trout ;” and with regard to the pile or fall which 
obstructs the progress of the trout, and over which the salmon leap, he adds, 
“ They can go over it at tide-time, v/ithout leaping ; after the tide rises they 
can go over it ;” p. 134. He likewise observes, “ A trout goes very far up the 
river to spawn.” — “ The smaller the fish is, they go the higher up into the little 
streams to deposit the spawn ; but the trout in the Moy are quite a different 
kind of trout from what we call in Scotland the salmon or sea trout ;” p. 134. 
IV. Whitlixg. — Sir H. Davy considers this fish as a young salmon, and 
