216 BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The calico bass will be an excellent addition to our waters, for not 
only is it very hardy but also very fertile ; besides; its rapid growth and 
the good quality of its flesh make it an altogether desirable species. ; 
It will be very serviceable, also, as food for the Salmonidce , on account 
of its remarkable fecundity. Its introduction into waters already 
stocked will cause no inconvenience, for, although it is predaceous, the 
calico bass has a mouth so small that it can seize only little animals, 
worms, small crustaceans, etc. 
M. Bertrand, desirous of propagating this very interesting species, 
placed again this year at the disposition of the members of the National 
Acclimatization Society some of the young. These young fishes will 
be delivered about the month of April. 
54.— A HYBRID BETWEEN THE LAKE TROUT AND BROOK TROUT. 
By TABLE TON II. BEAN. 
The Pennsylvania Fish Commission has been experimenting for some 
years, at the Corry Station, with hybrids between the lake trout, 
Salvelinus namaycush, and the brook trout, Salvelinus fontinalis. A 
very brief account of the experiments is to be found in the report of 
that commission for 1886. Some fine specimens of these artificially 
produced hybrids have been received by the U. S. Fish Commission* 
A large one measuring about 20 inches in length is apparently a male 
as the lower jaw has a small cartilaginous tip. The end of the maxilla 
extends behind the eye a distance nearly equal to the length of the 
snout. The scales are larger than in the brook trout and about equal 
in size to those of the lake trout. The caudal is deeply forked, about 
as deeply as that of the lake trout. In shape the hybrid is similar to 
the lake trout, as, also in the general pattern of coloration; but the 
very numerous spots on the sides are somewhat smaller and a pale 
lemon in color instead of whitish. The spots below the middle line of 
the body have a center of orange. The pectorals, ventrals, anal, and 
the lower lobe of the caudal have a broad white edge. The ventrals 
and anal are a pale vermilion orange. The outer half of the upper sur- 
face of the pectorals is dusky. There is a narrow black line limiting- 
the white of the ventrals and a similar trace bounds the white of the 
anal. The ground color of the sides is greenish-olive. The sides of 
the head have numerous spots of lemon-yellow, some of them larger 
than the largest of those on the sides. The lips are yellowish flesh 
colored; the eye is golden, with a dusky border; the top of the head 
and back have some scattered vermiculations like those of the brook 
trout, but much less developed and not so plentiful. The caudal and 
dorsals are spotted with lemon-yellow, like the sides. 
A smaller one, supposed to be a male, has the back slightly elevated 
as in old male brook trout, but its caudal is forked and it has the large 
scales and peculiar coloration of the hybrid? 
1 
