THIRTEENTH ANNUAL MEETING. 41 
indicate the points of difference; and granted that the impression 
of dissimilarity is correct, it still remains in doubt whether when 
bred in other waters, either variety will retain its peculiarities. 
However, when we came to place the land-locked salmon of 
either district by the side of the normal form of Sa/mo salar, and 
to include in our survey other than anatomical features, there 
are not wanting data for an interesting comparison. 
In the first place, we find a general resemblance in form and 
color. The young fry are so closely alike that the eye fails to 
separate them if mixed together. As they grow we find further 
that the reproductive functions of the males are in both forms 
active at a very early stage. while yet in what is known 
as the parr-stage, marked externally by the presence of 
bright red spots and dark transverse bars or “finger-marks”’ 
upon the sides; and at Grand lake stream may be observed 
several other stages of growth closely resembling those of the 
migratory salmon. The adults have identical habits in the 
spawning season, and the same} remarkable external changes 
take place in the adult males at that season of the year,—the 
deepening of the body, the lengthening of the head, the curving 
of the jaws, the growth of the wonderful hooked bony process 
on the tip of the lower jaw, the assumption of brighter colors— 
though these changes are generally not quite so marked in the 
land-locked as in the anadromous varieties. The color of the 
flesh is also the same, and there is a similarity, though not an 
identity of flavor. 
On the other hand, we find certain well marked differences. 
Some things favor the theory of an arrested development. For 
instance, the dark bars on the sides, which are very prominent 
marks in the young fish, but entirely disappear in the adult mi- 
gratory salmon, are always retained on the inner skin of the 
land-locked fish and may be found by stripping the skin off. I 
have also observed among the Sebago fish, some cases of a reten- 
tion of the external bars in at least one individual thirteen inches 
long; whereas, normally they become invisible from without 
when the fish is about eight inches long. 
As might be expected, the inferior size of the land-locked 
salmon is accompanied by a lower rate of fecundity, but this 
