1062 REPORT—1885. 
while more or less albinoism existed in such as had the sight of both or of only one 
eye affected. The general colours of these hybrids were yellowish shot with 
purple, and reticulated with irregular black bands, spots, and markings on the 
body, but most closely spotted along the upper surface of the head and back. 
Dorsal fin yellow, with spots and bands; pectorals black-tipped ; anal with its first 
three rays white, the fin behind this being stained with dark grey; caudal dark 
edged, and having a few indistinct bars at its base. The colours of the male 
parent or of the American char predominated over those of the female or Lochleven 
trout. On November 12, 1884, some males were found to be ripe, but the females 
not quite so. In this instance, as in others, the males were most forward, while 
the age of these fish was about two years, rendering it evident that both eggs and 
milt may be expected in a hybrid between a trout and a char in its second year. 
The foregoing experiment was repeated on November 29, 1888, and about one in 
‘seventeen of the eggs failed to hatch. 
The last experiment was now reversed. November 15, 1882, 8,000 eggs of an 
American char were fertilised from a Lochleyen trout. About one in three failed 
to hatch. The young were much deformed, many had their spines crooked, and in 
some there was atrophy of their posterior portion with a deficiency of fins generally, 
especially of the caudal. The colours of these hybrids closely resembled those 
seen in the preceding experiment, or those of the female fish, the American char 
predominating over those of the male parent, the Lochleven trout. About eight 
of these fish still survive. 
The next set of intercrossing were between the British and American chars. 
November 15, 1882, about 9,000 ova of an American char were milted from a char 
from Loch Rannoch. The mortality among the eggs was nearly one in four and 
three-quarters. There were no considerable number of monstrosities or malforma- 
tions. The colours were of a beautiful iridescent purple, with thirteen transverse 
or par-bands along the sides, the whole of the body being sprinkled with light 
spots. The front edge of the dorsal, ventral, and anal fins were white, as was also 
the outer pectoral ray. There were a few dark marks along the base of the dorsal 
fin. In this experiment the colours mostly partook of those of the male parent or 
Scotch char, which largely predominated over those of the female parent or 
American char. By November 12, 1884, the majority seemed to be in a breeding 
condition. 
The final series of hybridisation experiments which I propose alluding to in this 
paper were intercrossings between the foregoing hybrid races; again, however, 
drawing attention to the fact that, as these fish were all in their second season, 
such a young age may account for unsatisfactory results, but each additional year 
will doubtless be productive of increased interesting facts. 
November 12, 1884, 146 eges were obtained from a hybrid between the British 
and American chars, and milted from another of the same breed ; only six hatched, 
and these died prior to the period for turning the young into the rearing ponds. 
December 6, 1884, 600 eges, each about 0°15 of an inch in diameter, were 
obtained from a hybrid between the British and American chars, and milted by 
one oi the same race. Only about fifty hatched on February 23, and of these a 
single one survived to be turned into a rearing pond. 
These hybrids were likewise crossed with the original parent stock. November 
12, 1884, 1,350 eees of a Lochleven trout were milted from a hybrid offspring 
from the Lochleven trout, crossed by the male American char. About twelve of 
the eggs ‘eyed,’ but only three of these embryos arrived ata full size, but even 
they failed in hatching out, dying in their shells. 
November 12, 1884, 4,500 eges taken from two Lochleven trout were milted 
from a hybrid offspring from the British and American chars. 1,292 eggs were 
picked out dead from the hatching trays, 1,568 were unimpregnated, only a little 
more than one-third hatched, and among these were many deformities and a few 
dropsies. A great mortality occurred among these young fish,and only 320 lived 
to be turned into the rearing pond. 
It would appear from the foregoing that the following conclusions may be more 
or less drawn :— : 
