14 THE AMERICAN MUSEUM JOURNAL 



voted six arduous years, beginning with the explorations of Dr. 

 Wortman and ending with those of Mr. Granger. As a result 

 of this work the geology of the basin is now thoroughly under- 

 stood. It divides into a series of great steps or substages, each 

 of which is distinguished by its own peculiar forms of life or of 

 specific stages. Only in the upper stages do the great horned 

 Uintatheres appear for the first time. During the season of 

 1904 the Museum secured the most complete skeleton thus far 

 found of a Uintatherium, including the fore and hind limbs. 

 This will now be mounted with the aid of certain portions of 

 the type specimen of Dinoceras mirahile in the Yale Museum. 



The party sent to central Wyoming under Mr. Peter Kaisen 

 had a somewhat similar experience. They were exploring the 

 ' ' Bone Cabin ' ' dinosaur quarry which has yielded such remark- 

 able results during the past seven years. The output this 

 season was in general singularly disappointing, indicating that 

 the quarry was gradually playing out; but at the last a single 

 find was made which repays the entire efforts of the whole 

 season, consisting of the skeleton of one of the smaller Iguanodont 

 dinosaurs remotely related to the famous Iguanodonts which are 

 preserved in the Royal Museum of Brussels from the Bernissart 

 quarries. 



The work of this season ends our explorations in the Bone 

 Cabin dinosaur quarry. Together with the fine specimens 

 which have been found in other parts of Wyoming this quarry 

 has given us an almost complete picture of the life of the Jurassic 

 period, so that it has been decided to devote an entire hall to, the 

 animals, great and small, of this one stage in the history of 

 the earth. In this hall the most imposing specimen will be 

 the Brontosaurus, already mounted. Near it will be placed the 

 skeleton of the carnivorous Laosaurus, part of the Cope collection 

 presented to the Museum by President Jesup, This skeleton 

 will be mounted in a imique manner upon the prostrate bones of 

 another specimen of Brontosaurus which was found in the Como 

 Bluffs in 1897. Materials are collecting for the mounting of 

 Diplodocus and Camarasaurus or Morosaurus. The Bone Cabin 

 quarry had yielded remains sufficient with some restoration 

 from other skeletons to mount Stegosaurus entire. The speci- 



