Jan., 191 5. Annual Report of the Director. 393 



structural and dynamical geology, which occupy the drawers under the 

 lithological exhibits, have been completely reinstalled; all specimens 

 have been placed in trays in a logical order and labeled, the drawers 

 have been numbered, and indexes have been prepared so that any 

 specimen wanted can be found at once and can be shown to anyone 

 desiring to study it. Material was prepared for several new cases for 

 the work of the Harris Fund, in addition to a number of duplicates of 

 those previously prepared. The new subjects illustrated include semi- 

 precious stones, varieties of common rock, volcanic products, and coal- 

 tar products. In the laboratory of vertebrate paleontology the prepara- 

 tion of vertebrate fossils has been actively continued and a considerable 

 amount of material has been prepared. A skeleton of the sabre-tooth 

 tiger was prepared for mounting; completion of the preparation and 

 mounting of the slab containing 25 skeletons of the Water Deer, Lepto- 

 meryx, described in last year's report, was accomplished; the large 

 slab of Uintacrinus was taken apart and entirely remounted; a skeleton 

 of the Cave Bear was repaired and remounted; a nearly complete 

 skeleton of the fossil camel Oxydactylus and a skull of Elotherium were 

 prepared for exchange; a partial skeleton of Oxydactylus and skulls 

 of Aceratherium and Ancodon were prepared for exhibition; a large 

 specimen of Orthoceras was cleaned of plaster and a durable mount 

 provided; the skeleton of the Washington mammoth presented by Mr. 

 George Manierre was disarticulated and carefully packed in boxes so 

 as to provide safety in storage; a set of jaws of the large shark Char- 

 charodon was cast in plaster and mounted for the purpose of replacing 

 the former exhibit of this kind which was somewhat defective as to de- 

 tail; some progress was made in mounting a skeleton of Canis diurus, 

 and the entire collection of teeth of mammoths and mastodons, some 

 of which were undergoing disintegration, was carefully treated in such a 

 manner as to insure its preservation. 



In the Department of Zoology a large habitat group of American 

 Bison or Buffalo, consisting of five animals, a large old bull, a young 

 bull, two females, and a calf, has been added to the exhibition collection. 

 The scene is laid in Nebraska. Burrowing Owls, Prairie Dogs, and 

 Rattlesnakes, which are common in that prairie country, are included in 

 the group. The following single mammals have been installed and 

 placed on exhibition in the serial collection: Chinese Takin (Budorcas 

 bedfordi), a rare large mammal; Kansu Deer (Cervus kansuensis) ; 

 Spectacled Bear (Tremarctos ornatus), a rare species from the Andes of 

 Peru secured by Museum expedition, as was also the White-lipped 

 Peccary (Tayassu pecari); Drill (Papio leucocephalus); White-tailed 

 Mongoose {Ichneumia albicauda), and Porcupine (Erethizon dorsatum). 



