120 
TJie Scottish Nat7i7'ahst. 
early days of May. The smolts are numerous in the loch in April' 
and May, and have generally all disappeared by the middle of the 
latter month. 
Salmo fario, Linne, the Brown Trout. The common trout 
abounds in the loch and all the tributary streams, and, like the 
preceding species, exhibits an infinitude of variation. It occasion- 
ally grows to a large size, specimens weighing 8J lbs., lbs., and 
11^ lbs., having come under my own observation, but these are 
exceeded by a trout weighing 12 lbs., taken at Inversnaid in 1889, 
and one of a like weight at Rossdhu a few years earlier. These 
large fish were all taken by anglers with rod and line ; trout of 2 
to 6 lbs. are by no means scarce, many such being taken every 
year. 
A few large fish ascend the streams early in summer along with 
the sea trout, and remain in the upper reaches until spawning has 
been completed, but the bulk of the brown trout do not visit the 
spawning beds until they are about ripe — in October and Novem- 
ber — when they enter the streams, remaining only a few days and 
then dropping back into the loch, where they speedily recover 
their condition. 
In addition to the foregoing species of the typical Salmonidae, we 
may possibly include the Great Lake Trout from Switzerland, and 
the Brook Trout from North America, both which species have been 
introduced. I do not think, however, that they have thriven ; or, 
at least, they have not maintained their identity, as no trace of 
them has been seen since they were turned in many years ago. 
The so-called Sab?io ferox is also said to exist, but I do not think 
this variety has ever been taken ; the name ferox being applied to 
any ugly overgrown brown trout, whilst the true Salmo ferox is a 
very handsome fish, with a perfectly symmetrical body, smallish 
head, and spotted with very large elliptical spots of a deep purple 
colour with a yellow halo. 
Ooregonus clupeoides, Ladpede, the Powan. Fresh-water 
Herring. This aberrant member of the Salmonidae frequents the 
loch in enormous numbers, and is captured solely by net, only a 
few instances being on record in which they have been taken by 
fly or bait. 
The powan spawns from October to December, and, unlike the 
typical Salmonidae, does not enter the streams for that purpose, 
but deposits its spawn on stones and gravel in the shallow bays. 
