38 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1917. 



number of amethyst cr^^stals, many semiprecious stones, and a large 

 number of minerals and rocks collected in connection with studies 

 of the gem deposits of southern California. Among the latter were 

 extensive collections of rocks and ores representing geological re- 

 searches in several districts in the western United States. 



From other sources were obtained manj^ rare as well as some in- 

 structive series of minerals and a number of showj^ specimens espe- 

 cially desired for exhibition. Among these were type specimens of 

 stevensite and creedite, material illustrating the genesis of tlie zeo- 

 lites and their association witli glauberite cavities, a remarkable 

 specimen of glendonite from Australia, an exceptionally large crys- 

 tal of iron pyrite and a fine specimen of crystallized anglesite. 



The principal acquisitions in invertebrate paleontology were a 

 collection of Silurian fossils, transferred by the Geological Survey, 

 which had formed the basis of papers illustrating the geology and 

 paleontology of Maine, the types of nine species of Paleozoic crin- 

 oids, a series of rare and recently described insects from the Tertiary 

 rocks of Colorado, several hundred species of European invertebrates, 

 and about 2,000 specimens of Lower Ordovician fossils from the zinc 

 mines of Arkansas. 



A collection of Permian vertebrates from Baylor County, Texas, 

 contains the greater part of a skeleton of the large finbacked reptile 

 Dimetrodon^ complete enough to mount for exhibition, besides re- 

 mains in less perfect condition of the same form and of C ardiocepha- 

 lus^ Lyosorophus^ Diplocaulus^ ^eynwuria^ and Lahidosaurus., and 

 many bones of small rei^tiles and batrachians. The skull and lower 

 jaw of a fossil horse, the type of a recenth'' described species, from 

 the Pleistocene gravels of the Yukon Territory, and part of the skull 

 of a fossil muskox from the Pleistocene of Miami County, Indiana, 

 were also obtained. 



About 400 specimens of small mammalian remains of rare forms 

 from cave deposits in the mountains of western Cuba were collected 

 for the Museum by Mr. William Palmer, and a large part of the 

 skeleton of an extinct and probably undescribed species of bird was 

 received from the Geological Survey. Goucher College, of Balti- 

 more, deposited a collection of reptiles and cetacean remains from the 

 Arundel formation of Maryland, bringing together in the National 

 Museum practically all of the known vertebrate material from that 

 formation in Maryland. 



Secretary Walcott and party spent the summer and early fall 

 on the Continental Divide between Alberta and British Columbia, 

 south of the Canadian Pacific Railway, and besides extensive geo- 

 logical observations collected about 1,000 pounds of Cambrian mate- 

 rial containing fossils, which were shipped to Washington. 



