380 Mr. Y ARRELL on the Trachee of Birds. 
under the name of Peintade Cornal, but does not mention the 
anatomical structure. 
Dr. Parsons has given a representation of the trachea of the 
Demoiselle (Ardea Virgo of Linnæus) in the 56th volume of the 
Philosophical Transactions, from which Dr. Latham copied his 
figure: but as the true character of this trachea is less perfectly 
understood by a detached figure, and as this figure moreover is 
somewhat incorrect in the form of the bronchia, I have ventured 
to add a drawing of the sternum of this bird with its trachea in 
situ, the better to compare it with the structure of the same part 
in the very rare bird that will follow. In the present instance, 
the trachea, quitting the neck passes downward between the 
branches of the furcula toward the anterior edge of the keel, 
which is hollowed out to receive it; into this groove, formed by 
the separation of the sides of the keel, the trachea passes, and is 
firmly bound therein by cellular membrane. In the figure an- 
nexed, a small portion of one edge of the keel is removed, to 
show the depth of the insertion. The usual form of furcula 
does not prevail in this bird: it is not here; as in most others, a 
detached bone, but has the point of union of the two branches 
firmly ossified to the keel, or may be considered as a prolonga- 
tion of the keel itself, extended to the head of each clavicle, and 
affording a firm support to the wing. The peculiar formation of 
the trachea, and its insertion within the keel of the sternum in 
this bird, may be considered as exhibiting the commencement of 
that structure, which, with some modification in a second spe- 
cies, is carried to its greatest extent in the Cranes. 
One example only of the rare bird above mentioned appears 
to have been brought alive to this country ; and this specimen 
will be found described and figured by Mr. Vigors in the second 
volume of the Zoological Journal, page 234, under the name of 
Anthropoides Stanleyanus. It is fortunate for science, that the 
notice 
