llt> 0. L'. Wieland — Notes on the Armored Dinosauria. 



The specific isolation of Hierosawrus Sternbergii is be- 

 lieved to be clearly established, since the nearest form with 

 which it can be compared is Stegopelta of Williston (loc. cit.) 

 from a different horizon however, the Fort Benton. Not as 

 yet clearly illustrated, that genus is described as having mainly 

 rounded dermal elements, whereas those of the present fossil 



Fig. 2. 



Figure 2. — Hierosaurus Sternbergii Wieland, x 0'37. Characteristic 

 dermal elements showing variation from the straight keeled forms a-c, to 

 the crescent keeled forms, /, g, and the sigmoid keel e. In all these instances 

 (except c, incomplete) it can readily be determined by inspection of the 

 specimen which is the anterior end. [That of e is below.] 



cannot be so described. But in other respects these forms are 

 so near as to make it possible that a fuller knowledge of both 

 will warrant bringing the Niobrara saurian within the genus 

 Stegopelta,' while the next nearest relation is doubtless the 

 slightly older Stereocephalus of Lambe* from the Belly River 

 series of the Bed Deer River, Alberta, f 



*New Genera and Species from the Belly Eiver Series (Mid-Cretaceous) ; 

 by Lawrence M. Lambe. Contributions to Canadian Paleontology, vol. lii, 

 Ottawa, 1902, p. 25. 



f Since penning these lines I have shown the type material of Hierosaurus 

 to Professor Williston, who says he believes the form generically distinct 

 from Stegopelta . and calls attention to the fact that in the latter many of the 

 dermal plates bear a large shallow pitting whereas no such markings are 

 present in any of the Hierosaurus plates, though so many have been recov- 

 ered. 



