112 
THE CALIFORNIAN SALMON. 
exceeds fifteen inches in length. It is the small burn 
trout of the Highland streams, rarely weighing more than 
a pound to a pound and a quarter. It has not yet been 
introd uced intothe Southern Hemisphere, but the Council 
of the Acclimatisation Society has taken steps to obtain, 
through Mr. Prank Buckland, a shipment of the ova. It 
is likely that this fish, from its smaller size, would suit 
our streams better than the larger variety, but as in 
Britain it is a more northerly form, it is doubtful whether 
it may stand the climate so well in Australia, owing to the 
high temperature to which it would be subjected. 
The “brown trout,” or S.fario ausonii , is of exceedingly 
rapid growth, equalling in this respect, if not excelling in 
its early stage, that of the salmon, and it has the faculty of 
adapting itself to very different conditions. It does well 
in our creeks and rivers ; it thrives in a still pond, where 
there is little or no current for many months in the 
summer, and it is able to live in the brackish water of the 
estuaries of the Tasmanian and New Zealand rivers, when 
it becomes so changed as to puzzle the savants as to its 
identity. It then becomes, to some extent, migratory, as 
it is obliged to ascend into fresh water to spawn. This 
adaptability to circumstances, and its great size, rapid 
growth, and prolific nature, besides its power of enduring 
high temperatures, render it exceedingly valuable wherever 
it has been introduced. 
The Salmo fario has the most perfect dentition of any of 
the salmonidae, and the double row of teeth on the vomer 
which do not become lost, as in the migratory salmonoids, 
serve as one of its main distinguishing features ; and it 
never assumes the silvery garb of the migratory kinds, 
although at the approach of the breeding season its colours 
become more brilliant and lustrous. 
The Salmo eriox (L. Sys. Nat.), or S. cambricus of 
G-unther, is a migratory fish, usually known as the “ bull 
