From the facts given above, Professor Marsh is led to placing
these undoubtedly peculiar animalia in an order different from any
yet established, intermediate between the Proboscidia and the Perisso-
dactylata. To me it seems much more probable that they belong to
the Ungulata proper, and that no separate order is necessary for their
reception. In the characters I have given, there are none which show
them to have any true Proboscidian affinities, whilst there are several
which seem to indicate that they belong to a family of the Artiodacty-
lata, and not to the Perissodactylata. Among the reasons in favour
of Dinoceras and its allies being Artiodactylate are the following :—


The astragalus has a well-developed cuboid facet.
. The palate is complete between the posterior molars.
. There is no third trochanter to the femur.
The premaxille are edentulous.
The anterior premolar is not developed.
gr 9 PO pt


Page 33.
Page 36.
124 THE NASAL BONES OF BIRDS,


21. ON THE VALUE IN CLASSIFICATION OF A PECU-
LIARITY IN THE ANTERIOR MARGIN OF THE
NASAL BONES IN CERTAIN BIRDS.*


Since commencing the study of the anatomy of birds, it has always
appeared to me that two distinct types of nasal bones can be dis-
tinguished among them without difficulty—and that if those which
present the abnormal characters are considered separately, they pre-
sent other features in common which justify their being placed in the
same class, and their entire separation from those which present the
less modified arrangement.
