VERTEBRATE PALAEONTOLOGY IN igos 15 



mens above mentioned will give us a typical Iguanodont. The 

 small "bird-catching" dinosaur of the period, Ornitholestes,is 

 already mounted. 



It is proposed to place these skeletons in the central portion 

 of the hall, and in the side cases to exhibit the less complete 

 skeletons and the anatomy of the limbs and other parts of the 

 body, together with diagrams showing the localities in which 

 the famous specimens have been found. It will, however, re- 

 quire several years' work in the laboratory before this exhibit 

 can be completed. 



It has not yet been possible to examine either the horse or 

 the Iguanodont skeleton in the Museum, but as soon as they 

 reach the East work will be begun upon them. 



The most striking success of the year, however, attended the 

 expedition to Montana. In 1902 Mr. Barnum Brown, who was 

 in charge of this party, found a few remains of a very large 

 carnivorous or flesh-eating dinosaur, imbedded in hard sand- 

 stone. The materials which were secured then included a portion 

 of the skull and jaws, a few of the vertebrae of the backbone, 

 part of the hip girdle and portions of the limbs. The fact that 

 they represented such different parts of the body encouraged 

 the hope that further exploration would reveal additional 

 materials. Accordingly instructions were given that clearing 

 and blasting above the locality where the specimen was found 

 should be instituted on a large scale. As a result of this work 

 as the summer wore on the additional remains of this great 

 animal came to light, so that representative portions of the entire 

 body have been secured by the Museum. The animal proves 

 to be of gigantic size, the total length being estimated at 39 

 feet, the height of the skull above the ground at 19 feet. The 

 new dinosaur is, in fact, the largest carnivorous land animal 

 which has thus far been discovered. In reference to this power- 

 ful construction Professor Osborn has given it the name Tyran- 

 nosaurus rex, or the "king tyrant saurian." It was probably 

 adapted to preying upon the great horned herbivorous dinosaurs 

 of the period, known as Ceratopsia. This remarkable skeleton 

 will be worked out and placed upon exhibition as soon as possible. 

 It will form a worthy companion-piece to the great Bronto- 

 saurus. 



