288 
FISHES. 
also found here, averaging 3 inches in length, with 
somewhat peculiar coloration ; not apparently abun- 
dant. May be young of the other, but have the 
appearance of adult fish. 
e. Crassapuil trout. Closely allied to S. levenensis, first 
described by Dr. F. Day, from examples forwarded 
by us from Durness. 
Other remarkable varieties occur, most of which we 
believe are known to us; many of these inhabit very 
inaccessible and rarely visited lochs. Upon this subject 
we may have more to say at some future time. 
In the Dunrobin Museum is a series of stretched skins 
of trout, collected by the late Mr. Young of Invershin, 
which are called crosses between trout and salmon, etc. 
This collection might have been extremely valuable 
from a scientific point of view had the information been 
fuller and more carefully kept. As it is, we fear the speci- 
mens are worthless, unless any of the late Mr. Young's 
manuscripts are available and could be searched. 
Regarding the Caithness trout Mr. Peach says : " Varying 
with every loch and burn according to whether the shores 
of the same loch be sandy, muddy, stony, or peaty ; that 
is, the fish vary with every condition of situation, colour 
of water, amount of light, food, etc. The finest trout in 
Caithness are got from Lochs Watten and Scye. The fish 
in the former loch may have been sea-trout which have 
lost themselves in fresh water, like those of Loch Crassapuil 
in Durness (Sutherland) and Lochleven. Loch Scye is a 
small loch with sandy shores in the Eeay country, near Loch 
Shurrery, and belongs to the Duke of Portland. 
Many deformities of trout occur within the limits of 
our district, as elsewhere in Britain. Some of the more 
remarkable which we have obtained we have preserved in 
our collections. Such deformities are, in extremely isolated 
areas of water, permanent, and apparently so completely 
