82 Report of the President 



but having a huge head and high compressed beak. This is 

 believed to be one of the four or five most important scientific 

 discoveries among fossil birds yet made, and will be of great 

 popular interest when prepared and placed on exhibition. 



The complete skeleton of the Horned Dinosaur Monoclonius 

 has been installed in the Dinosaur Hall, and a partial skeleton 

 showing considerable portions of the skin is 

 Pr ® p i l r ^ t . 1 ® n . placed temporarily in the case opposite the ele- 

 vator. A third skeleton is in course of prepara- 

 tion. A number of other important specimens of Cretaceous 

 dinosaurs have been prepared during the year; the reinstalla- 

 tion of the wall-case exhibits on the north side of Dinosaur 

 Hall has been completed and the greater part of the collection 

 of fossil turtles on the south side of the hall remounted and 

 relabeled. 



The most important addition in the Tertiary Mammal Hall 

 is the fine skeleton of the Californian Sabre-tooth Tiger, pre- 

 sented by the University of California and mounted during the 

 past year. 



The preparation of the series of skeletons of the great 

 Clawed Ungulate Moropus from the Agate fossil quarry has 

 been completed, and four of the most perfect skeletons will 

 be selected for a group in the center of the Tertiary Mammal 

 Hall, the remainder reserved for study, sale or exchange. 



The collections in the large dinosaur storage room have been 



thoroughly overhauled and rearranged in systematic order, so 



as to be fully accessible and readily handled and laid 



out when required for study. Considerable progress 



has been made in revising and condensing the arrangement of 



the fossil mammal collections. 



The new storage arrangements have facilitated the mono- 

 graphic studies upon the great Jurassic Dinosaur Camara- 

 sanrus, undertaken under Professor Osborn's 



Research and direction by Mr. C. C. Mook. Professor Osborn 

 Publication J , . —,. 



has also continued his studies upon the Tita- 



notheriidse and Equidse and upon certain carnivorous dino- 

 saurs. Dr. Matthew and Mr. Granger have continued their 



