to exhibit thé various circular and oval apertures which pervade
different parts of this bony enlargement, the opposite
sides not being exactly alike,„ either in the number, form,
or situation of these apertures in the bone, which in a natural
state are closed by ^delicate transparent membrane. The
bronchial tubes are divided higher at, the back than in front,
as seen in the figure on the allow free passage for
the oesophagus between them from behind forwards.
NATATORËS. ANATIDÆ.
T H E CANADA GOOSE,
o r C r a v a t G o o s e .
Ahi® Canadensis, ■ ■ Gd^ad^Cloose, BEWieity/Brit. Birds, voLdi. p. 293.
Anser ,, ,, ,, Flem. Brit. An. p. 128. , ~
CygnuSf ,, ,, Swan, Jent^ns, Brit. Vert.,p. 227.'
So frequently are specimens of the Canadian Goose shot
which do not exhibit either in their actions or plumage any
marks of having escaped from Confinement, and so often
are flocks seen in different parts of the country, apparently
in a naturally wild state,* some pairs of which, in the season
produce and rear their young in places selected by them