GREAT XORTH AMERICAN LAKE-TROUT — AMERICAN BROOK-TROUT — GRAYLING. 191 
GREAT NORTH AMERICAN LAKE-TROUT. Salino namaycush (Walbaum). 
jMentioned, under its specific synonym of S. amethystinus (Mitchill), at 
p. 392 ‘Fishing’ (Badminton Library) as having been introduced into Northampton- 
shire, in 1873, by the Marquis of Exeter, who writes me : — “ From twenty to thirty 
thousand of these have from time to time been turned into the river Gwash, 
CO. Rutland, after being hatched at Burghley, but all my waters and 
ponds in which Trout of various kinds, and Black Bass had been bred or introduced 
are in Northamptonshire, and were transferred from thence to the Gwash and 
Welland (the latter only as regards Black Bass, though below Deeping I have 
given some ten or twenty thousand Trout Fry to the Fishing Club of that 
part of the Welland), and as, in the former river, there always have been plenty 
of good Trout, it can hardly be said that I introduced Trout into the County 
of Rutland.” 
AMERICAN BROOK-TROUT. Salmo fontinalis (Mitchill). 
This species, which is really a Charr belonging to the sub-genus Salvelini 
of Gunther, was introduced into Thornton Resen^oir by the members of the 
Fishing Club sometime about 1878-80, and ]Mr. G. Lillingston Johnson kindly 
informs me that “ they came from the breeding-ponds at Loch Leven. They 
did well, but we thought they got their food from the little Fresh-water Winkle, 
and so were not often caught, as they did not take the fiy eagerly. There 
was an opinion prevalent that they took advantage of the flood at the overflow 
and went to the lower brook. I caught one 4 lbs. in weight.” IMr. J. Garle 
Browne supplements this by saying : — “ Salmo fontinalis were introduced at 
the instigation of my old friend, the late Mr. John Wright, surgeon at Markfield, 
but he told me they were a failure, and I never heard of their attaining any 
size. He lamented to me that they had ever been introduced into the water.” 
GRAYLING. Thymallus vulgaris (Nilsson). 
Harley wrote Appears to be limited to the Soar and its confluence 
with the Trent,” but I have no knowledge of it, and doubt its occurrence in 
the upper Soar, although it may occur at its junction with the Trent, which 
is, I presume, what Harley meant. 
Family LEPTOLEPID^. 
Leptolepis concentricus (Egerton). 
This fossil fish is mentioned by Mr. Harrison * as having been met with 
in the Lower Lias Limestone “ First Floor,” in a section of a large pit between 
Barrow and Sileby, in 1874. 
* ‘ Geol. Leicestershire and Rutland,’ p. 37. 
