l'LATE Xd. 
Mr. Pennant is uncertain whether the grey (which he believes to 
be the Sewen of South Wales) is not a mere variety of the Salmon ; 
but on the authority of Mr. Ray he describes them separately. Ray 
tells us it is a strong fish, that it does not ascend the fresh waters till 
Auguft, when it rushes up with great violence ; that it is rarely taken, 
and not much known. “ The inhabitants of South Wales,’* 
adds Mr. Pennant, “ seem extremely well assured, that it is a distinct 
species from the Salmon. They appear in the Esk in Cumberland, 
from July to September, and are then in spawn. The lower jaw 
grows hooked when they are out of season.” “ The head is larger 
in proportion than that of the Salmon. In the jaws are four rows 
of teeth, and on the tongue are eight teeth. The back and sides, 
above the lateral line, of a deep grey, spotted with a number of 
purplish spots. The belly silvery : the tail even at the end.” “ This 
we believe to be the Sewin, or Shevvin of South Wales. The de- 
scription above, was communicated to us by Dr. Roberts, of Here- 
fordshire.” Penn. Brit. Zool. 
The Sewen differs from the common Salmon, (Saimo salar) in va- 
rious particulars that will not fail to strike the eye of the judicious 
naturalist on comparing the two fishes. The general contour of the 
whole fish is slightly dissimilar ; the head is shorter and more sloping ; 
while the lower jaw extends rather beyond tire upper one, the pre- 
cise contrary of which is observable in the common Salmon. The 
back is of a pale greyish colour, glossed with blue, and by no 
means so dark as in the common Salmon ; this greyish colour pre- 
vails under the scales, from the back to the lateral line, beneath 
which, the whole fish is of the brightest silver. Both on the back 
and sides, above and below the lateral line, the body is marked 
with dusky purple spots of a roundish shape, which, on close in- 
