THE SALMON FAMILY 85 
Reference has already been made to the extraordinary 
change that takes place in brown trout in Tasmania and 
New Zealand. These fish at home would be called bull 
trout. Further, Sir Herbert Maxwell quotes in his book 
on “British Freshwater Fishes” from so high an 
authority as Sir Gibson Maitland, that if the young of 
bull trout, hatched from bull trout eggs, are prevented 
from going to sea, they retain the habits and character 
of ordinary brown trout. 
Of our fresh-water salmonoids, there is little doubt 
that such fish as the Great Lake trout (Salmo ferow), the 
Loch Leven, and the gillaroo and others, are merely 
varieties of the common brown trout due to perverted 
feeding habits and special environment. 
The Great Lake trout is a cannibal pure and 
simple, and the strongest evidence that this par 
ticular trout is merely a perverted brown trout is that 
the young of this fish as a Great Lake trout do not exist. 
If the reader has any doubt of the Loch Leven being a 
brown trout in disguise, let him import some of this 
wild sporting fish, and turn them into a pond or stream 
where no other trout exist. Removed from the food 
and deep waters of Loch Leven, in a few months’ time 
these imported fish will be difficult to distinguish from 
the common brown trout. 
The gillaroo of Ireland is distinguished by his large 
brilliant red spots, his golden colour, and the immensely 
thickened lining of the stomach wall. The coloration 
and the thickening of the stomach wall can be accounted 
