The Dinosaurs of Wyoming - Wyoming State Geological Survey ...

90 THE DINOSAURS OF WYOMING
Carniyorous dinosaurs are always rare-much more so
than those of the amphibious type, occurring in the same beds.
A Brontosaurus skeleton, obtained in the Bone Cabin Quarry,
shows seyeral bones, especially the spines of the tail bones
(Figure 34), scored and bitten off, as though by some carni-
FIGURE 33.-A LARGE CARNIVOROUS DINOSAUR FEEDING.
-After Lucas.
vorous animal which had either attacked the brontosaur when
alive. or had feasted on the carcass. - When the Allosaurus
jaw was compared with the marks on the brontosaur bones,
it was found to fit them exactly, the spacing of the scratches
being the same as the spacing of the teeth. Moreover, on taking
out the brontosaur backbones from the quarry, a number
FIGURE ?4.
Part of the tail of a large amphibious dinosaur, Brontosaurus, showing grooves
and scratches cut by the teeth of carnivorous dinosaurs on the neural spines and on
the body of the backbone joint in the center. The cuts were made after the death 01
the amphibious dinosaur. Specimens in the American Museum of Natural HistonJ.
Collected in Wyoming.-After Osborn.