Vereiue und Anstalten, mit welchen Schriftentausch stattfindet. 
Odessa: Neurussische Gesellschaft der Naturforscher. 
St. Petersburg: Acad&mie impe6riale des sciences. 
St. Petersburg: Kaiserlicher botanischer Garten. 
Amerika. 
‚Berkeley: University of California. 
Boston: Society of Natural History. 
Boston: American Academy. 
Boston: Museum of comparative Zoology. 
Buenos-Aires: Sociedad cientifica Argentina. 
Cambridge Mass.: Museum of comparative Zoology. 
Chapel Hill: Elisha Mitchell scientific society. 
San Franeisco: California Academy of Sciences. 
Halifax N. S.: Nova Scotian Institute of Science. 
San Jose: Museo nacional. 
Lima: Cuerpo de Ingenieros de Minas del Perü. 
St. Louis: Academy of Science. 
St. Louis: Missouri Botanical garden. 
Madison: Academy of Sciences, Arts and Letters. 
Mexico: Instituto geolögico. 
Montana: Biological Station of the University. 
Montevideo: Museo nacional. 
New-York: Botanical Garden. 
Sao Paulo: Commissao geographica e geologica. 
Sao Paulo: Museu Paulista. 
Philadelphia: Academy of Natural Sciences. 
Rio de Janeiro: Museu nacional. 
Rock Island Ill.: Augustana Library. 
85 
Salem: American Association for the Advancement of Science. 
Santiago de Chile: Deutscher naturwissenschaftlicher Verein. 
Toronto: Canadian Institute. 
Washington: Department of Agriculture of the United States 
of North America. 
Washington: United States Geological Survey. 
Washington : Smithsonian Institution. 
Washington: The Microscopie. 
Asien, 
Manila: Exposition Board of the Government of the Philippine 
Archipelago. 
6* 
