Plate 44
SAURISCHIAN DINOSAURS
ALLOSAURUS × ¹/₁₈₀ BRONTOSAURUS × ¹/₂₅₀
Plate 45
ORNITHISCHIAN DINOSAURS
STEGOSAURUS × ¹/₉₀ TRACHODON × ¹/₁₀₀ PALEOSCINCUS × ¹/₂₅ TRICERATOPS × ¹/₁₂₀
SUBORDER CERATOPSIA.—
The ceratopsians, or horned dinosaurs, are another group of dinosaurs that are known only from rocks of [Cretaceous] age. These plant-eating dinosaurs possessed beak-like jaws, a bony neck frill which extended back from the skull, and one or more horns. Triceratops ([Pl. 45]) is the largest of the horned dinosaurs (some forms were as much as 30 feet long), and the skull measured 8 feet from the tip of the parrot-like beak to the back of the neck shield.
CLASS AVES.—
Because of the fragile nature of their bodies, birds are seldom found as fossils. In spite of this, however, some interesting and important [fossil] bird remains have been discovered.