MB. F. DAT ON THE LOCH-LEVEN TROUT. 
85 
relationship of the Loch-Leven and burn-trout. In November, 
1883, some eggs of a Loch-Leven trout were milted from a salmon- 
parr at Howietoun (which specimen I still possess in spirit), and 
hatched in March 1884. As I have elsewhere related, most of 
the young died of dropsy, but a few lived, and some are still at 
Howietoun in pond 16, very many being small, but -a few of fair 
size, some even giving eggs and milt this season. On November 
24th I removed one of these fish, a beautiful parr, showing the long 
pectorals and large caudal fin of the salmon, but having only nine 
finger-marks ; while as to colours it was of a beautiful silvery 
glossed with gold, the rayed dorsal fin rather densely spotted 
with black, some of the spots having a deep scarlet edging, and a 
white margin with a dark base being present at the front upper 
corner of this fin as well as of the anal. Adipose dorsal red-edged ; 
caudal straw-coloured, with red upper and lower edges. Numerous 
black spots in the upper half of the body, also some red ones, but 
most of the latter along the lateral line and some below it. A 
large black spot on opercle and some smaller ones. 
Here was a hybrid showing the number of bars of the trout, 
and also most of the trout-colours, but with this remarkable varia- 
tion from the Loch-Leven breed, that the orange edging was 
present on the adipose dorsal * and the light edging on the dorsal 
and anal fins. In fact the spots on the dorsal fin closely resembled 
those seen in the burn-trout in Sutherlandshire. Unless the 
Lochlevens have burn-trout blood in them, how could these fish 
possibly throw back to the colours of the latter race P 
It is normal for the adipose fin of the Loch-Leven trout to have 
black spots upon it, but no orange margin. The reason is pro- 
bably similar to that which causes these fish to have no orange 
spots on the body, because if orange spots exist upon the body 
the adipose dorsal is also orange-tipped. Evidently whatever 
causes this coloration in one part of the body equally does so in 
the other. 
As to the internal organization of the Loch-Leven trout, we 
have been told that it possesses from 49 to 90 crncal appendages, 
and that the teeth along the body of the vomer “ form a single 
series, and are persistent throughout life.” In fact from the time 
Parnell first ascertained that these trout often possess a larger 
* Not only is the adipose dorsal normally destitute of an orange edging or 
orange spots in both young salmon and young Lochlevens, but this colouring is 
present in many sea-trout with which young Lochlevens have been compared. 
