EXPLANATION OF PLATE V.
This Plate pourtrays the peculiar symmetry,
parallelism, or antagonism of the arteries and veins
in the lung of the salamander. Its beauty is only
discovered by a very attentive examination.
The minute arteries and veins are often simply
parallel. The terminal artery frequently passes
into the angle made by two venous roots,, and
sometimes into the space formed by a curved vein.
This disposition is seen even at the very tip of
the lung : so that in no part does the artery terminate
immediately in the vein.
1 Piy.
