78 REPORT OF ISTATIONAL, MUSEUM, 1922. 



and other minerals from Italy; and (3) a number of imperfect 

 beryl crystals from Brazil, several of which were of gem quality 

 and from them two beautiful stones haA^e been cut. 



Collections made in the field by Assistant Curator Foshag include 

 vanadium minerals and hydrozincite from Supai, Ariz., secured 

 through the courtesy of C. A. Heberlein, and numerous minerals from 

 California and Nevada. 



Gems of beauty and value have been added to the Isaac Lea collec- 

 tion through the Frances Lea Chamberlain fund. A series of uncut 

 diamonds comprising 20 stones, selected to show the natural crystal 

 forms and the variations in color — white, yellow, light and dark 

 brown — from the mines of the Arkansas Diamond Corporation, 

 Murfreesboro, Ark., is of more than ordinary interest. A magnificent 

 cut gem of the rare orthoclase from Madagascar, weighing 61 carats; 

 a blue zircon from Australia, weighting 10.9 carats; a series of 

 fresh-water pearls, both pink and white in color, from rivers of 

 Indiana and Arkansas; a collection of agates dredged from the 

 mouth of the Uruguay River, many of which have been polished; 

 and 12 pieces of Baltic amber have also been acquired. Individual 

 gifts to the gem collection include nine cut gems of sodalite, from 

 the Ice River Valley, British Columbia, presented by Mrs. C. D. 

 Walcott, and a fine example of cut and mounted rhodonite, deposited 

 as a loan. B. F. Wheeler, Vincennes, Ind., donated 21 baroque pearls 

 showing a variety in shape and coloring, from the Wabash and White 

 Rivers, Ind.; H. P. Petersen, Washington, D. C, 70 cut pieces of 

 precious coral in white, pink, and red; and the American Gem and 

 Pearl Co., New York City, a yellow topaz from Brazil. This com- 

 pany also generously cut the two fine aquamarines from the Brazilian 

 stones mentioned above. 



Although less widely distributed geographically than last year, 

 valuable accessions of paleontological material have been received 

 through the generosity of various oil companies, who donated to the 

 Museum the collections made by their field geologists, or from indi- 

 viduals traveling in foreign countries. Of particular interest are 

 the Mesozoic and Cenozoic fossils from Mexico, Central and South 

 America, India, and several European areas. 



Through the interest of Dr. L. W. Stephenson, examples of the 

 peculiar rudistids and some rare crinoids from the Upper Cretaceous 

 of Tamaulipas, Mexico, were obtained from the Mexican Gulf Oil 

 Co., A. W. Becldey, and Messrs, Smith, Newell, and Bishop, all of 

 Tampico, Mexico. The rudistids have been made the subject of a 

 memoir by Doctor Stephenson, and the crinoids described by Dr, 

 Frank Springer. The Transcontinental Petroleum Co., Tampico, 

 likewise donated about 5,000 specimens of Tertiary fossils from 

 Tehuantepec, collected by Dr. Bruce Wade: Dr. C. Wythe Cooke 



