(From remains found in Cretaceous strata of Wyoming, U.S.A.)
This Dinosaur, about the size of a large rhinoceros, had a huge
three-horned skull with a remarkable bony collar over the neck. But, as
in many other cases, its brain was so small that it could have passed
down the spinal canal in which the spinal cord lies. Perhaps this partly
accounts for the extinction of giant reptiles.]
[Illustration: _Photo: "Daily Mail."_