CHAPTER IX.
THE BEAKED DINOSAURS (Concluded.) D.THE HORNED DINOSAURS, TRICERATOPS, ETC.
_Sub-Order Ceratopsia._ In 1887 Professor Marsh published a brief notice of what he supposed to be a fossil bison horn found near Denver, Colorado.

Two years later the explorations of the lamented John B.Hatcher in Wyoming and Montana resulted in the unexpected discovery that this horn belonged not to a bison but to a gigantic horned reptile, and that it belonged not in the geological yesterday as at first thought, but in the far back Cretacic, millions of years ago.

For Mr.Hatcher found complete skulls, and later secured skeletons, clearly of the Dinosaurian group, but representing a race of dinosaurs whose existence, or at least their extraordinary character, had been quite unsuspected.

It appeared indeed that certain teeth and skeleton bones previously discovered by Professor Cope were related to this new type of dinosaur, but the fragments known to the Philadelphia professor gave him no idea of what the animal was like, although with his usual acumen he had discerned that they differed from any animal known to science and registered them as new under the names of _Agathaumas_ 1873 and _Monoclonius_ 1876.

Professor Marsh re-named his supposed bison "_Ceratops_" (_i.e._ "horned face") and gave to the closely related skulls discovered by Mr.Hatcher the name of _Triceratops_ (_i.e._ "three horned face"), while to the whole group he gave the name of Ceratopsia.
[Illustration: Fig.