40 THE ROYAL SOCIETY OF CANADA 



Humerus, ulna, and radius (displaced). Three complete digits 

 of fore-foot (in proper relative position to each other) 

 (Plate VIII). 



Incomplete scapula, with coracoid. 



Sternal bone. 



Fragment of ilium, and part of sacrum. 



One phalanx and two terminal phalanges of hind foot, and one 

 metatarsal (Plate XI, figure 1). 



About two hundred scutes of various sizes, with numberless 

 ossicles. Of the scutes a number are in place, or in their proper 

 relative position to each other over considerable areas; the 

 remainder were scattered either in the matrix or at the 

 surface (weathered out) (Plates V, VI, VII, IX, X, and XII). 



In Euoplocephaliis the armature, so far as known, consists of 

 numerous polygonal plates on the head, and a semi-circle of high 

 keeled scutes coossified in an arch over the neck. The skull of Pano- 

 plosaurus is protected above by a few plates of large size, and the 

 neck dorsally by a longitudinal row of transversely paired plate-like 

 scutes. 



With the preparation and study of other Stegosaurian material 

 in the Geological Survey's collections, it will probably be found that 

 several distinct forms of armoured dinosaurs existed in Belly River 

 times, although their diversity is hardly thought to have been as great 

 as that of the contemporaneous hadrosaurs and horned dinosaurs. 



The dinosaurian fauna of the Belly River formation, Alberta, as 

 at present known, consists of the following genera: 



Hadrosaurs Ceratopsians Stegosaurs 



Stephanosaurus Eoceratops Palaeoscincus 



Corythosaurus Centrosaurus Euoplocephalus 



Gryposaurus Styracosaurus Panoplosaurus 



Prosaurolophus Brachyceratops 



Chasmosaurus 



Panoplosaurus minis gen. et sp. nov. 



Generic and Specific Characters. Skull depressed, broad behind, 

 ending narrowly and squarely in front;' completely enclosed in bony 

 plates and scutes. Superior head plates large; cheek plates present. 

 Nostrils latere- terminal. Orbits placed far back. Infratemporal 

 fossae placed latero-posteriorly, directed backward. Teeth small, 

 with a laterally compressed, moderately high, serrated crown, borne 

 on a long sub-cylindrical root. Transversely twinned, low keeled 



