The ankylosaurs were four-footed, herbivorous, Cretaceous dinosaurs
which had relatively flat bodies. The skull and back of the animal were
protected by bony armor, and the club-like tail was armed with spikes.
_Paleoscincus_ (Pl. 45), a typical ankylosaur, had large spines
projecting from along the sides of the body and tail. The armored spiked
back and the heavy club-like tail probably provided _Paleoscincus_ with
much-needed protection from the vicious meat-eating dinosaurs of
Cretaceous time.
[Illustration: Plate 44
SAURISCHIAN DINOSAURS]
ALLOSAURUS × ¹/₁₈₀
BRONTOSAURUS × ¹/₂₅₀
[Illustration: Plate 45
ORNITHISCHIAN DINOSAURS]
STEGOSAURUS × ¹/₉₀
TRACHODON × ¹/₁₀₀
PALEOSCINCUS × ¹/₂₅
TRICERATOPS × ¹/₁₂₀