[ 20 5 ] 
I have never examined the back bone of ’ thefe 
perch, but I have now by me that of one of the 
trout (which I mean likewife to give you an account 
of) : this bone, any one may immediately fee, differs 
mod apparently from that of a common trout, 
or any other fifh,by its being crooked near the tail. 
I have therefore no doubt but that the back bone of 
thefe perch will turn out to be equally crooked. 
Thefe fifli are not only crooked near the tail, and 
for about one third of the whole length of their body 
there is likewife a very remarkable protuberance on 
each fide, which I have opened with a knife, but did 
notobferve it to differ materially from other parts of 
the flefh. I have likewife eat thefe perch, and fhould 
not, by the tafle, have diftinguifhed them from the 
common ones of the fame kind. 
I happened likewife (after thefe inquiries with 
regard to the perch of Llyn Raithlyn) to hear of 
trout, which were crooked in the fame part, laid 
to be peculiar to the river Eynion in Cardiganshire,, 
which is a lfnall brook, that empties itfelf into the 
Dovey, near Egglwys Vach, and is on the road from 
Machentleth in Montgomeryfhire, to Talypont in. 
Cardiganfhire *. 
* In Dalekarlia, a province of Sweden, near Fahlun, are two - 
fmall lakes, famous for the Angular lhape of the perch, where- 
with they abound, Thefe perch grow to the common Aze, and 
are of a good tafte, but they have all a hump on their back. This 
peculiarity is taken notice of in Linnaei Fauna Suecica,f p. 1 18. 
The country people in the neighbourhood imagine that it may be 
occafioned by the quality of the water in thole lakes, which 
•f In ftagnis Fahlnnrs huj as pifeis (Percje) varictas eft, qux fpina recurva, & corpore. 
omnino gibbo, fretjuens repentur. . 
I. have; 
