1870.] IN THE GROWTH OF SALMON, 33 
Salmon. They weighed from 2 to 3 Ibs. each; their flesh was pale 
in colour. 
2. The same acute naturalist has published a separate volume 
‘On the growth of Salmon in Freshwater’ (1839), wherein six 
coloured illustrations of fish of the natural size, at various stages 
during the first two years of their growth, are given. The speci- 
mens figured show very well the progressive growth and change of 
dress with age. Yarrell remarks that there is a comparative defi- 
ciency of general growth in the older specimens. One of the 
largest measured 14 inches long and weighed 14 ounces. 
3. Lloyd states that near Katenberg there is a salmon-fishery. 
“These salmon are bred in the lake, and, in consequence of cata- 
racts, cannot have access to the sea.”” They are small in size and 
inferior in flavour. 
4. I may as well here quote the opinion of another eminent Scan- 
dinavian pisciculturist, Prof. Rasch, of the Christiania University. 
Writing to an English friend *, among other matters he says, ‘‘ The 
assertion of some of your countrymen that the Salmon cannot be 
acclimatized so as to become entirely a freshwater fish is quite at 
variance with the results of experiments we have made in Norway. 
Some years ago Hetting hatched out numbers of Salmon-ova, which 
he subsequently turned loose in the Tyri-fiord; and during the last 
two years fish have been caught in that lake, resembling in every 
respect ‘Salmon proper.’ It is impossible for them, as you know, 
to return thither, even should they succeed in reaching the sea. 
‘As regards acclimatizing Salmon to fresh water, our enclosures at 
Greffsen+ are too small. But if in larger pieces of water it be 
only possible to prevent their first migration to the sea after they 
have assumed the Smolt dress, they will readily accustom them- 
selves to their freshwater home. And should the water be a very 
large lake, such as Ladoga, Werner, Peipus, and as rich in nourish- 
ing food, the freshwater Salmon will then attain about the same size 
as the Salmon of the sea.” 
5. Mr. George Anderson, of Glasgow, communicated the follow- 
ing authentic case to the ‘ Field’ (see 23rd and 30th June, 1866) air 
This gentleman obtained in 1862 about thirty specimens of Salmon 
parr from the well-known Stormontfield Salmon-ponds§. The 
fish, as he observes, were then two years old, but had not put on 
the Smolt dress preparatory to migration. 
Twenty-nine of the Parr were placed in a freshwater pond well 
supplied with Minnows and other food. In June 1866 the pond 
* Who, under the initials “ N. R. B.,” has published the letters in ‘ Land and 
Water,’ vol.i. pp. 221-245 (March 31st and April 7th, 1866). 
f An establishment close to Christiania. 
{ Iam indebted to Mr. Charles Darwin for calling my attention to this in- 
teresting notice. 
§ A pretty sure guarantee that the fish were the young of Salmo salar, as it is 
not at all likely that the trained eyes of Mr. Buist and other experts would be 
deceived in them—nor, indeed, that ova specially destined to stock the river 
Tay, and not, as in Huningue, exported, should be chosen from other than pure- 
bred Salmon. 
Proc. Zoox. Soc.—1870, No. LI. 
