sts have proved that the
remains of horses occur in the most superficial deposits of both
North and South America, just as they do in Europe. Therefore,
for some reason or other,--no feasible suggestion on that
subject, so far as I know, has been made,--the horse must have
died out on this continent at some period preceding the discovery
of America. Of late years there has been discovered in your
Western territories that marvellous accumulation of deposits,
admirably adapted for the preservation of organic remains, to
which I referred the other evening, and which furnishes us with a
consecutive series of records of the fauna of the older half of
the Tertiary epoch, for which we have no parallel in Europe. The
researches of Leidy and others have shewn that forms allied to
the _Hipparion_ and the _Anchitherium_ are to be found among
these remains. Rut it is only recently that the admirably
conceived and most thoroughly and patiently worked-out
investigations of Professor Marsh have given us a just idea of
the vast fossil wealth and of the scientific importance of these
deposits. I have had the advantage of glancing over the
collections in Yale Museum; and I can truly say that, so far as
my knowledge extends, there is no collection from any one region
and series of strata comparable, for extent, or for care with
which the remains have been got together, or for their scientific
importance, to the series of fossils which he has deposited
there. This vast collection has yielded evidence bearing on the
question of the pedigree of the horse of the most striking
character. It tends to show that we must look to America rather
than to Europe for the original seat of the equine series; and
that the archaic forms and successive modifications of the
horse's ancestry are far better preserved here than in Europe.

"Professor Marsh's kindness has enabled me to put before you a
diagram, every figure of which is an actual representation of
some specimen which is to be seen at Yale at this present time.

"The succession of forms which he has brought together carries
us from the top to the bottom of the Tertiaries. Firstly, there
is the true horse. Next we have the American Pliocene form of the
horse (_Pliohippus_): in the conformation of its limbs it
pre