. The horse and its relatives . Front View of the Bones of the Right Fore (a) and Hind {l>) Feet of theAmerican Eocene Phenacodus primcBvus, \ natural size afford a fair idea of what those of the ultimateancestor may be expected to have been like. Phenacodus belongs to a group of early andgeneralised ungulates forming a suborder—the^ op. cit., p. 163. THE FORERUNNERS OF THE HORSE 277 Condylarthra—of lower grade than either Perisso-dactyla or Artiodactyla. All the members of thisgroup had five-toed fore and hind feet, and like-wise rested a considerable portion of the soleupon the ground in
. The horse and its relatives . Front View of the Bones of the Right Fore (a) and Hind {l>) Feet of theAmerican Eocene Phenacodus primcBvus, \ natural size afford a fair idea of what those of the ultimateancestor may be expected to have been like. Phenacodus belongs to a group of early andgeneralised ungulates forming a suborder—the^ op. cit., p. 163. THE FORERUNNERS OF THE HORSE 277 Condylarthra—of lower grade than either Perisso-dactyla or Artiodactyla. All the members of thisgroup had five-toed fore and hind feet, and like-wise rested a considerable portion of the soleupon the ground in the original plantigradefashion—a feature in which they differ markedlyfrom the horse and its relatives, which walk onlyon the very tips of their toes in the extreme ofthe modern digitigrade style. The two series ofsmall bones of the wrist (carpus) and ankle (tarsus)joints are also arranged in distinct vertical rows,without that interlocking which characterises theseportions of the skeleton in the Perissodactyla. In concl
Size: 1088px × 2298px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecthorses, bookyear1912
