Semi-Centennial Volume. 89 



and my perfect health and stren^h, combined to make up the success of 

 last year, even though we went into a country that Barnum Brown, the 

 p:reatest living collector in America of reptiles, had spent four years in 

 exploring. We found his tracks everywhere, and the network of roads 

 he had built through the bad-lands was of inestimable value to us. 

 Further, on account of our having two outfits in the same field, we were 

 able to assist each other in hauling our finds out of the canyon of the 

 Red Deer river, about 600 feet deep, to the prairie above. My most re- 

 markable discovery was a very complete articulated skeleton of the 

 carnivore Gorgosaio us libra tns, of Lambe. A larger specimen of this 

 species was discovered by my son, Charles M., in 1913, in the same gen- 

 eral region. This has been used by Mr. Lambe as his basis for a memoir 

 published by the government of Canada. My specimen lay on the sur- 

 face. The upper left ribs and front limbs wei'e destroyed by erosion. A 

 small portion of the end of the tail also is missing. The head and neck 

 were turned back, so the head lay parallel with the illia. The tail, too, 

 was curved towards the head. The abdominal ribs are present for the 

 first time in the history of Cretaceous carnivors, and in position. There 

 seems to be fourteen sets of four each. The right front limb, present and 

 complete, is less than 20 inches long. The ulna is only 4% Inches long, 

 while the metatarsals are 20 inches long. The hind limbs are complete 

 except a few distal phalanges. The skull is normal, with very narrow 

 muzzle. About twenty-seven caudals are present. The illium is about 

 25 inches long. This specimen is No. 5 in my collection. 



The second specimen, discovered by my son and chief assistant, Levi, 

 is a remarkable example of the plated dinosaur Palseoscincus costatus 

 Leidy, known only to me by single teeth. The type was one of the 

 famous teeth Dayden had in his vest pocket, when he was run out of the 

 Judith river beds by Black Feet Indians about 1848 — the Belly river 

 series of Sand creek. Red Deer river. Alberta. From this region my 

 material came and is of the same age (Pierre) as the Judith River Bells 

 of Montana. This specimen is one of the largest, if not the largest, of 

 the Pierre plated dinosaurs. The entire skull and mandibles are present. 

 Back of the skull are the two half rings of anchylosed plates, and near 

 them another set. Both heads of the scapulae, with one front limb, are 

 present in place, and enough plates lie slightly disassociated to restore 

 correctly the dermal armor of this huge reptile for the first time to its 

 shoulder. The third set over the neck consists of a central plate with 

 cone-like projection over the dorsal spine, 9 inches long and 6 inches at 

 the base. Along the median line joining this on either side, are great 

 bony plates 26 inches long, 9 inches wide, and an inch and a half thick 

 where they join the middle plate, increasing in thickness to three inches 

 where the great horn-like projection begins to develop. This projection 

 is cone-shaped and a foot long. The ones that follow are still larger. 

 One of the terminal plates is 16 inches long, a foot wide and 9 inches at 

 the ba:se. It is hard to imagine what those oyer the body measure. The 

 body of these sluggish creatures is as round as a barrel. Some of the 

 ribs are anchylosed to the center of the vertebrae. Beneath the body the 

 plates are either very small, or made up of many rows of small nodules 



