REPORT OF NATIONAL MUSEUM, 1922. 85 



siderable amount of Doctor Bassler's time, as has also a report on 

 a large collection of Chinese fossils submitted by Professor Louder- 

 back, of the University of California. In this latter piece of work 

 he was assisted by Doctors Kirk and Knowlton, of the United States 

 Geological Survey. He has also personally catalogued and placed 

 in final Museum form many types of ostracods and bryozoans which, 

 on account of their microscopic size, required special attention. 



The preparation and mounting of the extinct Glyptodon collected 

 in Arizona by Dr. J. W. Gidley has been the work of primary im- 

 portance in the section of vertebrate paleontology. On account of 

 the large size and unusual character of this animal, it is a most 

 interesting and instructive addition to the exhibition series. The 

 mount is the work of Thomas Home, who is to be commended for 

 having so successfully accomplished a most difficult undertaking. 



Mention was made in last year's report of the preparation of a 

 number of Titanothere skulls to be used in a special exhibit. As 

 now installed it is the most comprehensive and ambitious exhibit of 

 this large, extinct mammal ever attempted, comprising 26 skulls 

 and other parts of the skeleton, representing 6 genera and 22 species. 



With the addition of the Palmer collection and the material ob- 

 tained by Mr. Boss during the present year, the collection of ceta- 

 ceans has now grown to be the most important of its kind in this 

 country. Mr. Boss has been engaged for a considerable period in 

 the preparation of this material, selecting representative series of 

 the best skulls for exhibition. Two wall cases have been devoted 

 to this exhibit, and, while the installation is not completed, it is 

 proposed to devote one section to examples of the short-beaked 

 cetaceans, one to the long-beaked, and a third to the whalebone 

 whales, with a small case between containing shark teeth and other 

 fossil remains, the whole making a comprehensive showing of the 

 fauna of the Miocene of the Chesapeake Bay region. The entire 

 collection of cetaceans is now in good working condition, although 

 not fully up to standard. 



In addition to the above work, Mr. Boss has prepared several 

 rhinoceros skulls and turtles, made molds and casts of a number of 

 fossil bird types, and has assisted in the renovation, rearrangement, 

 and installation of several small case exhibits. 



Doctor Gidley has cleaned and prepared for study most of the 

 smaller mammals of the material collected in Arizona last year. 

 This includes the systematic arrangement of 54 species of rodents, 

 the new species of which have been studied and described. Mr. 

 Home spent considerable time on the preparation of the mastodon 

 skulls and other bones of this collection, and Mr. Barrett was also 

 engaged in the rough preparatory work connected with it. Mr. Bar- 

 rett has also assisted in other preparatory and repair work. 



