REPORT OF THE SECRETARY 15 



30,000 mollusks, chiefly European, from Dr. H. R. K. Agersborg; 

 and nearly 50,000 specimens of plants from many sources, repre- 

 senting a wide variety of localities. 



Geology. — To the Canfield collection were added 174 mineral spec- 

 imens, including a rich mass of North Carolina uraninite showing 

 crystals and weighing over 5 pounds, obtained through the interest 

 of Dr. H. P. Barret. Through the income of the Roebling fund 393 

 mineral specimens were added, of special interest being a collection 

 of minerals from pegmatitic pockets in the granite area of Striegau, 

 Germany, and the material resulting from Dr. W. F. Foshag's field 

 work in Mexico under the auspices of the fund. Many of the 

 Museum's friends contributed valuable mineral specimens, many of 

 them from Mexico. Species of minerals new to the Museum include 

 ahlfeldite, blockite, kolbeckine, and selenolite from Bolivia; aglau- 

 rite from Czechoslovakia; igalikite, metejarlite, and naujakasite 

 from Greenland; johannsenite from Mexico; repossite from Italy; 

 and sahlinite from Sweden. Dr. Eugene Poitevin presented a speci- 

 men of his new mineral ashtonite. 



The increase in the meteorite collection was especially notable, 25 

 new falls being added, bringing to 592 the total number of distinct 

 meteoric falls now represented. 



About 500 rock specimens were added to the Henry S. Washington 

 petrographic series. Accession of ores was of increased importance, 

 several mining companies as well as individuals donating valuable 

 samples. From the United States Geological Survey a collection of 

 described material was received illustrating the petrology of the 

 Louisiana and Texas cap-rocks. 



The outstanding gift of the year in invertebrate paleontology was 

 the Hurlburt collection of Lower Paleozoic fossils, especially rich in 

 rare New York Ordovician trilobites, crinoids, cystids, and mollusks. 

 This collection was presented by Edward N. Hurlburt, of Rochester, 

 N. Y., as a memorial to his father, who assembled it in the early days 

 of American paleontology. Nine gifts furnished fossils from coun- 

 tries beyond North America, which are esj)ecially valuable for com- 

 parative purposes. About 30,000 Devonian and other Paleozoic 

 fossils were collected for the Museum by Dr. G. A. Cooper in Mich- 

 igan, Ontario, and New York, and (with R. D. Mesler) about 10,000 

 fossils in Virginia, Tennessee, and Arkansas. 



Materials resulting from the field expedition to Idaho under Dr. 

 C. L. Gazin are of first importance in vertebrate paleontology. Fos- 

 sil remains of the extinct horse Plesippus shoshonensis formed the 

 bulk of the collections. An excellent skeleton of the sauropod dino- 

 saur C amarasaurus was obtained through exchange with the Car- 

 negie Museum of Pittsburgh. 



