REPORT OF NATIONAL MUSEUM, 1919. 101 



Through the Frances Lea Chamberlain Fund, the following were 

 added to the Isaac Lea collection of gems : Five opals from Austra- 

 lia, of a variety heretofore unrepresented; a cut zircon weighing 51 

 carats ; two turquoises, figured by Dr. J. E. Pogue in his memoir on 

 The Turquoise; one kunzite, weighing 7 carats; one 16-carat black 

 opal, from Nevada; two stones cut from the rare mineral benitoite; 

 one pendant carved from nephrite and one, cut cameo, of chal- 

 cedony ; 32 fresh-water pearls from Tennessee ; and 30 gems cut from 

 minerals in the Museum collection. 



The collection of gems was further enriched by six cut garnets 

 from Arizona, presented by Mr. Frank Springer, East Las Vegas, 

 New Mexico, and the exhibit of imitation and artificial stones by 

 a brilliant cut gem manufactured from uranium oxides, gift of Maj. 

 Harry S. Bryan, Phoenix, Arizona. 



But two accessions of imj^ortance were added to the petrological 

 collections, one being a series of Brazilian eruptive rocks, gift of Dr. 

 Mathia,s G. de Oliveira Roxo, Eio Janeiro, Brazil, and the other a 

 collection from Sinaloa, Mexico, accompanied by a map of the region, • 

 sent to the United States Geological Survey for examination by Mr. 

 Jesus G. Ortega, and thence transferred to the Museum. 



Invertebrate paleontology. — Notable additions to the Cambrian col- 

 lections include about 7,000 Middle Cambrian fossils, obtained by 

 Secretary Walcott from the celebrated locality at Burgess Pass, Brit- 

 ish Columbia, recorded as a deposit from the Smithsonian Institu- 

 tion; approximately 400 from the classic Lower Cambrian locality 

 at Troy, New York, gift of Prof. A. F. Foerste, Dayton, Ohio ; about 

 500 from southern Pennsylvania, collected by Assistant Curator 

 Dr. C. E. Resser; and 200 from the Lower Cambrian at Lancaster, 

 Pennsylvania, obtained from Dr. H. J. Roddy, Millersville, Penn- 

 sylvania. 



A valuable collection, including both invertebrates and plants, 

 mainly from the Carboniferous and Silurian rocks of Indiana, and 

 numbering at least 10,000 specimens, was presented by Mr. Alva 

 Shaeffer, Brazil, Indiana. The collection is especially rich in beau- 

 tifully preserved and excellently prepared crinoids, and the Museum 

 is fortunate in having been chosen as the depository for the results 

 of Mr. Shaeffer's life-long collecting. 



Several thousand Upper Cretaceous fossils from New Jersey and 

 about 1,500 from the Middle Ordovician of Kentucky resulted from 

 the field work of the curator. Dr. R. S. Bassler. These were ob- 

 tained chiefly for the study series, and their collection was incidental 

 to explorations for exhibition material. A large slab of fossilifer- 

 ous sandstone, crowded with well-preserved shells, and needed as 

 an introduction to the stratigraphic series of fossils, was secured from 

 the Eocene at Aquia Creek, Virginia. 



