SAUROPOD GENUS CAMARASAURUS, 389 



Preparation and Research in the American Museum. 



Acquisition. — The Cope Collection of Fossil Reptiles had been 

 examined in Philadelphia by Dr. W. D. Matthew and was trans- 

 ferred to the American Museum under his direction. The preparation 

 of the material was made by ]\Iessrs. Kaison, Charles and Otto 

 Falkenbach, Lang, Christman, Hoover, Bruckner, Carr and Home. 



Research in 1904. — Doctor Matthew went over the material, 

 under the direction of Professor Osborn, and catalogued and iden- 

 tified it so far as was possible with the aid of the records available, 

 distinguishing the material obtained in the earlier collecting in 1877 

 by Superintendent Lucas from that obtained in the later collecting in 

 1880 under Mr. Ira H. Lucas. The bones of the earlier collection 

 were given the number 5760, with variations according to their iden- 

 tification as individuals, such as 5760' and 5760" ; the bones of the 

 later collection were given the number 5761, with a modification 

 into 5761 -a for a presumably different individual than the rest of 

 5761. Subsequently Professor Osborn and Professor W. K. Gregory 

 made a further study of the vertebrae and arranged them provision- 

 ally into series, using in addition to the previous records the color of 

 the bones, those of the red series apparently having come from a dif- 

 ferent quarry than those of the yellow series. Most, if not all, of the 

 red bones probably came from Cope Quarry No. i, and most, if not 

 all, of the yellow from Cope Quarry No. 2. 



In connection with this work, which was carried on in 1904, Mr. 

 Rudolph Weber, then artist of the Department of Vertebrate Palaeon- 

 tology, made line drawings of many of the vertebrae. In 1906 some 

 wash drawings of the skull material were made by Mr. Erwin S. 

 Christman. These illustrations were originally prepared for the 

 United States Geological Survey Monograph on the Sauropoda, in 

 course of preparation by Professor Osborn. The cost of preparation 

 of these drawings was borne by the Survey. 



Research in ipi^-ipip. — In 1912 work on the Cope Sauropoda 

 material was renewed as part of the preparation of the Sauropoda 

 Monograph, which was being prepared for the Survey by Professor 

 Osborn. This work was undertaken by the present junior author 

 under the direction of the senior author. The entire Cope Collection 



