362 Field Museum of Natural History — Reports, Vol. III. 



satisfactory result was obtained. As only one tusk was present, 

 another was modeled in plaster and the whole carefully assembled 

 and bolted together. It was then mounted upon a well-constructed 

 base. An excellent specimen of especial local interest has thus 

 been secured. Another important preparation was that of a skeleton 

 of the Miocene camel (Oxydactylus longipes) the material for which 

 was collected by the Museum Paleontological Expedition of 1908 in 

 Nebraska. By means of the restoration of a few bones a complete 

 skeleton was obtained. This skeleton stands over six feet in height 

 and exhibits to a striking degree the characters of the camel family. 

 Only one other complete skeleton of the form is known. A nearly 

 complete skeleton of the Miocene wolverine, Aelurocyon, was chiseled 

 from its matrix and mounted in slab form. Two skulls of Archce- 

 otherium, one of which was collected in South Dakota in 1898 and 

 the other in Nebraska in 1908, were also cleaned from matrix and 

 mounted. These skulls were unusually well preserved and one may 

 be a new species. A fore leg of Hypohippus obtained in Nebraska 

 in 1908 and illustrating an interesting stage in the evolution of the 

 horse was mounted. Two skulls of the two-horned rhinoceros or 

 Dice rathe rium from Nebraska, a skull of Oligobunis from the same 

 locality and a skull and fore and hind legs of the remarkable form 

 M or opus were also prepared and mounted. Two cases of storage 

 trays were provided in addition to those already employed for storage 

 of vertebrate fossils and were nearly filled with cleaned and identified 

 specimens. A similar case of trays has also been provided for the 

 invertebrate fossils which will be used for specimens awaiting identifi- 

 cation, before their removal to the exhibition or the study series. Con- 

 siderable progress has been made in organizing the study collection 

 of ores and other economic minerals, a large part of the specimens 

 having been cleaned, wrapped, labeled, and distributed. To the 

 Department photograph albums 179 prints have been added during 

 thejyear, making the total number 2,372. Books, pamphlets, and 

 maps to the number of 492 have been added to the Department lib- 

 rary, making the total number in the library 6,042, and some binding 

 and repairing of books and rearrangement of shelf series in this 

 connection has been performed. 



The Department of Zoology installed during the year a striking 

 pair of African elephants in the central rotunda of the Museum. 

 Aside from this, no large groups have been completed though several 

 important studies both of mammals and of birds are well under way 



