54 EEPOET OF NATIONAL MUSEUM, 1911. 



in connection with the publication of Doctor Walcott's monograph 

 on Cambrian brachiopoda. 



Mr. C. W. Gilmore, custodian of fossil reptiles, described a new 

 genus and species of alligator from the Hell Creek beds of Montana, 

 and has in preparation a paper on the recently mounted skeletons of 

 C eratosaums and Camptosaurus. He also continued work on the 

 fossil reptiles of North Carolina for the Geological Survey of that 

 State. Mr. J. W. Gidley, custodian of fossil mammals, continued his 

 studies on zeuglodon and on mammals from the Fort Union forma- 

 tion, subjects mentioned in the last report, and brought together 

 most of the data required for papers on a new species of horse from 

 the Pleistocene of Nebraska, new species of rodents from the Miocene 

 beds of Kansas and Dakota, and a new species of deer from the 

 Mascall beds of Oregon. 



Most of the paleontological work of the United States Geological 

 Survey is conducted at the Museum, since it is necessary in that con- 

 nection to have constant access to the extensive collections of identi- 

 fied specimens which are here deposited, and several of the paleontol- 

 ogists of the Survey have long held honorary positions of responsi- 

 bility on the Museum statf. The results of their scientific studies are 

 not, however, reported to the Museum. Other establishments which 

 made use of the collections were the American Museum of Natural 

 History, the State Geological Survey of Maryland and Johns Hopkins 

 University, the Peabody Museum of Yale University, and the Geo- 

 physical Laboratory of the Carnegie Institution. Dr. O. P. Hay 

 continued his researches on Museum material, giving special atten- 

 tion to the distribution of the Pleistocene fauna of North America. 

 Among others who spent more or less time at the Museum, engaged 

 in investigations, may be mentioned Dr. J. P. Iddings; Mr. A. S. 

 Coggeshall, of the Carnegie Museum; Dr. John C. Merriam, of the 

 University of California ; Dr. H. M. Ami, of the Geological Survey 

 of Canada; Prof. C. A. Reeds, of Bryn Mawr College; Dr. Arthur 

 Hollick, of the New York Botanical Garden ; Mr. F. L. Canfield, of 

 New Jersey ; Mr. S. Ko, of Japan ; Dr. Friedrich von Huene, of the 

 University of Tiibingen, Germany; Dr. Jaroslaw Perner, of the 

 Royal Bohemian Museum, Prague; and Dr. Marie C. Stopes, of 

 Manchester University, England. 



Specimens were lent for study to Dr. John M. Clarke, State Geolo- 

 gist of New York; Prof. R. L. Moodie, of the University of Kansas; 

 Prof. W. H. Reed, of the University of Wyoming; Prof. H. F. Wick- 

 ham, of the University of Iowa ; Dr. G. F. Loughlin, of the Massa- 

 chusetts Institute of Technology; Dr. J. E. Whitfield, of Philadel- 

 phia ; and Dr. J. H. Bonnema, of Groningen, Holland. 



Field work. — The explorations in the Rocky Mountain region of 

 British Columbia by the Secretary of the Smithsonian Institution 



