36 .-- _Ankylosaurus_, top view of skull in fig.
35.

_After Brown_] This marvellous animal was made known to science by the discoveries of the Museum parties in Montana and Alberta under Barnum Brown.
Fragmentary remains of smaller relatives had been discovered by earlier explorers but nothing that gave any adequate notion of its character or gigantic size.

From a partial skeleton discovered in the Hell Creek beds of Montana, and others in the Edmonton and Belly River formations of the Red Deer River, Alberta, it has been possible to reconstruct the entire skeleton of the animal, save for the feet, and to locate and arrange most of the armor plates exactly.

A skeleton mount from these specimens will shortly be constructed for the Cretaceous Dinosaur Hall.
_Scelidosaurus, Polacanthus, etc._ Various armored dinosaurs, of smaller size and less heavily plated, have been described from the Jurassic, Comanchic and Cretacic formations of Europe.

The best known are _Scelidosaurus_ of the Lower Jurassic of England, and _Polacanthus_ of the Comanchic (Wealden).