78 REPORT OF NATIONAL MUSEUM, 1920. 



Agriculture, Washington City, all but about 500 of this number 

 having been received from the Bureau of Plant Industry. This 

 material includes 3,000 duplicate grasses intended for distribution 

 in the centuries of American grasses which are being prepared under 

 the direction of Mr. A. S. Hitchcock, custodian of the grass herba- 

 rium; 887 specimens of Mexican plants from little known parts of 

 Sinaloa, transmitted by the Forestry Commission of that state; 

 854 specimens collected in British Guiana by Mr. A. S. Hitchcock; 

 875 specimens collected in China by Mr. J. B. Norton; 337 speci- 

 mens collected in Florida by Mr. W. E. Safford, this having served 

 as the botanical basis of his recent Smithsonian paper upon the 

 natural history of Paradise Key; 2,398 specimens were received 

 in exchange from the New York Botanical Garden, Bronx Park, 

 New York City, Dr. N. L. Britton, Director. This material consists 

 largely of plants collected in Colombia by Messrs. Busby and Pen- 

 neil. and includes also a lot of 292 marine algae, chiefly from the 

 West Indies. Likewise in exchange, there were received 923 speci- 

 mens of Mexican and Central American plants from the Botanical 

 Museum of the University at Copenhagen, Denmark. This mate- 

 rial consists chiefly of specimens collected long ago by Liebmann 

 and Oersted, and is of unusual historic interest and value; 557 

 specimens, received from the Academy of Natural Sciences, Phila- 

 delphia, Pennsylvania, collected in Alberta by Mr. Stewardsun 

 Brown are of value as having served as the basis of a manual en- 

 titled. "Alpine Flora of the Canadian Rocky Mountains," published 

 a few years ago by Mr. Brown. Other important material collected 

 by various expeditions is mentioned below. 



EXTLORATIOXS AND EXIT: 'IT! n N S. 



Among the various expeditions by which the Museum has been 

 benefited three stand out prominently. 



The Collins-Garner Congo Expedition in the interest of the Smith- 

 sonian Institution had already returned before the beginning of this 

 fiscal year, and an account of its achievements is therefore found in 

 my report for 1919, but the specimens have not been incorporated into 

 the Museum series until the present year. The other African expedi- 

 tion was entered upon by the Smithsonian Institution in conjunction 

 with the Universal Film Manufacturing Company. The latter hav- 

 ing organized under the direction of the experienced collector, Mr. 

 Edmund Heller, an expedition which was to penetrate Africa from 

 south to north by way of Lake Taganyika for the purpose of obtain- 

 ing cinematographic films of the natives along the route and offering 

 to pay the expenses of one or more scientific collectors while in that 

 continent, the Smithsonian Institution obtained the services of Mr. 

 H. C. Raven, who for several years past had been collecting in the 

 Malayan Archipelago. Mr. H. L. Schantz also joined the expedition 



