Jan., 1921. Annual Report of the Director. 



38s 



mens of amethyst; excellent specimens of turquois, tiger eye and 

 thomsonite; some unique crystals of calcite from Joplin, Mo., show- 

 ing a new crystal habit; silver ores showing free silver from several 

 localities; and concentrates from various ores. The total number of 

 specimens in the collection is 277." Mr. William J. Chalmers presented 

 for addition to the William J. Chalmers crystal collection a remarkable 

 pseudomorph of quartz after crystallized spodumene from Greenwood, 

 Maine. Mr. Chalmers also presented a valuable book of photographs 

 of the diamond mines at Kimberley, South Africa. This book contains 

 114 original prints illustrating various phases of the processes of mining 

 at the Kimberley mines and covering chronologically nearly the entire 

 history of the mines. The United Verde Company and United Verde 

 Extension Company of Bisbee, Arizona, and the New Cornelia Copper 

 Company of Ajo, Arizona, presented full series of the various ores mined 

 by them and specimens of the associated rocks. These series in connec- 

 tion with specimens previously presented by the Utah Copper Company, 

 afford material for fully illustrating the developments which have taken 

 place in recent years in the utilization of the low-grade copper ores, 

 usually known as ''porphyry coppers." Specimens of both leaching 

 and flotation ores are included in the series. These series all form 

 important additions to the collection of copper ores. The kind offices of 

 Mr. William J. Chalmers in assisting in procuring these gifts are grate- 

 fully acknowledged. A cast of the Yenberrie, Australia, iron meteorite 

 was presented by the United States National Museum and a full-sized, 

 polished section of the meteorite was purchased. Dr. A. de Chairmont 

 presented nine individual aerolites of the Holbrook, Arizona, fall. By 

 exchange with the University of Chicago a nearly complete skeleton in 

 matrix of the rare Permian, lizard-like reptile, Varanosaurus, from 

 Texas, was obtained, also from the same institution and in a similar 

 way a prepared male skull and dentition of the extinct ungulate 

 Diceratheriimi, from the Miocene of Nebraska. 



The principal accession in the Department of Zoology during the 

 year was the collection of 676 specimens, chiefly mammals and birds, 

 obtained by Assistant Curator Osgood and Mr. H. B. Conover on the 

 expedition to Venezuela of which mention is made elsewhere. Mr. 

 Conover also presented to the Museum skulls and scalps of one moose 

 and two caribou from northwest Canada. An important addition to the 

 exhibition collection of mammals was a mounted giraffe presented by 

 Mrs. Mollie Netcher Newbury. A collection of 270 salt and fresh water 

 fishes from Louisiana was received in exchange from the Southern 

 Biological Supply Company of New Orleans. The invertebrates re- 

 ceived during the year consisted of a donation of over 8,800 shells 



