The Edmonton Beds 41 



His two powerful limbs on which his body is 

 posed are full ten feet in length. The three toes 

 armed with claws of hardened horn are over ten 

 inches long. He spans full thirty feet in length. 

 Small front limbs are hardly noticeable. He 

 drags a long tail on the ground. His long and 

 powerful jaws are armed with horrid teeth. 

 Some six inches in length with double edges ser- 

 rated on their cutting surfaces. Our herbivore, 

 knowing his weakness, rushes frantically back 

 towards the water, but he is unable to reach it. 

 His enemy is upon him and with relentless fury 

 strikes blows at his unprotected body, with first 

 one, and then the other claw-armed hind foot 

 that tears open the tender fresh and pours a 

 flood of life blood on the ground. The awful 

 terror of the scene has rendered us speechless 

 with horror, coming so swiftly in the peaceful 

 redwood forest. The sun was not darkened, the 

 perfume of flowers still scented the air ; the gen- 

 tle breeze sighed in the branches over head. 

 Though the victim was a cold blooded reptile, we 

 had become deeply interested in him and we were 

 unprepared for such a woodland tragedy. 



Coming back to the second question that has 

 so interested me: How has this great canyon 

 been cut out of the heart of the prairie through 

 the rocks of the Edmonton Cretaceous? 



The recession of the cliffs of the main canyon 

 and its side coulees is very rapid. The upper 

 beds, composed of uncemented fine sand and 



