EXPLANATION OF PLATE I.
The Figure in this Plate represents the dis-
tributidn of the | H .jfe - vessels in the tail of the stickleback.
The arteries run immediately along the„ ray,
giving off a few capillary vessels in its course;
where the ray divides, the artery gives off a
branch to supply the new space formed by this
division; at the extremity of the ray, the artery
turns and assumes the character of a vein.
The vein pursues a course more distant from
the ray than the artery, and receives the scattered
capillaries from the adjacent membrane. Near
the origin of the rays, the capillaries join and
form several shorter veins.
Fa.
