HISTORY OF THE †AMBLYPODA AND †CONDYLARTHRA These are two orders of hoofed animals which long ago vanished from the earth and no member of either is known to have survived later than the Eocene epoch; both were of great antiquity, dating back to the Paleocene, perhaps even to the Cretaceous. The last of the †Amblypoda are found in the lowest Uinta or highest Bridger, but they were relatively abundant in all the more ancient beds. The following table gives the more important American forms: Order †AMBLYPODA. †Short-Footed Ungulates Suborder †TALIGRADA I. †PERIPTYCHIDÆ. _†Periptychus_, Paleoc. II. †PANTOLAMBDIDÆ. † _Pantolambda_, Paleoc. Suborder †PANTODONTA III. †CORYPHODONTIDÆ. _†Coryphodon_, Wasatch and Wind River. Suborder †DINOCERATA IV. †UINTATHERIIDÆ. _Bathyopsis_, Wind River. _†Elachoceras_, Bridger. _†Uintatherium_, do. _†Eobasileus_, do. As is shown in the table, the suborder †Taligrada is entirely Paleocene in distribution, the †Pantodonta are lower Eocene and the †Dinocerata chiefly middle Eocene, though persisting into the upper. The †Dinocerata were the most striking and characteristic of Bridger mammals, and two or three phyla of them may be distinguished, though for our purposes this is hardly necessary, for these strange and bizarre creatures were all very much alike. From the commonest and best-known genus (_†Uintatherium_) they are called †uintatheres. They were large and ponderous animals, the veritable giants of their time, far exceeding any of their contemporaries. In appearance they were among the most fantastic of the many curious beasts which the fossils have revealed.