192 MEMOIRS OF THE CARNEGIE MUSEUM. 
made extensive excavations on the northern face of the hill at the point designated 
on the map as “Quarry No. 2.” Here he found a great many bones belonging to 
the genus Moropus in a disarticulated condition mingled with the remains of 
other genera. Although these bones were scattered, they have proved of great 
value in enabling the partial reconstruction of several smaller specimens. 
It should be observed at this point that the bones of the large individual found 
in Quarry No. 1 were not associated with the remains of other specimens belonging 
to the same genus, except that one or two cervicals of an animal of nearly the 
same size and belonging to the same genus and species were found here. The 
specimen No. 1604 lay practically apart, and although the bones were somewhat 
widely scattered, there has been no difficulty in deciding that they belonged to 
one individual. 
Professor Barbour in 1906 returned to the opening which he had made, and 
for a short time carried on work with results which were gratifying. 
The blocks containing the material collected for the Carnegie Museum were 
in part worked out in the winter of 1906-7 by Mr. W. H. Utterback, and this 
work was continued in the spring and summer of 1907 by Mr. S. Agostini and 
Mr. Peterson. Mr. Peterson, who in July, 1906, had published an account of the 
Agate Spring Fossil Quarry, which appeared in the Annals of the Carnegie Museum, 
in December, 1906, published in the Annals of the Museum a paper upon the 
Miocene Beds of Nebraska and Wyoming, in which he described a number of new 
species and incidentally gave a brief account of some of the material representing 
the larger specimen of Moropus upon which this Memoir is principally founded.'! 
During the spring and early summer of 1907 Mr. W. H. Utterback, under the 
instructions of the writer, continued the work of excavation which he had carried 
on in the previous year, and also made an opening on the eastern face of Carnegie 
Hill. Toward the close of the season he left the quarries in order to complete the 
excavation of the skeleton of one of the Ceratopsia which he had located in the 
fall of the previous year in Converse County, Wyoming, and was called home by 
the death of his father, after which time his connection with the Carnegie Museum 
terminated. 
After Mr. Utterback had left the spot a party from the American Museum 
of Natural History entered the excavation made on the eastern side of Carnegie 
Hill, in which Professor F. B. Loomis of Amherst College had also done some 
excavating, and worked for a couple of weeks, recovering a quantity of frag- 
mentary material. 
‘Mr. Peterson has treated part of the material used by him in preparing this paper (Specimen No. 
1424) as the type of a new species, M. hollandi. Science, N. §S., Vol. xxxviii, p. 673. 
