xxviii Bulletin American Museum of Natural History [Vol. XXXIX 



at Tervueren but also, so far as possible, paratypes of the new species 

 described in the series of volumes which will be collectively known as 

 The Zoology of the Belgian Congo. Thus the Congo Museum at 

 Tervueren will be reinforced in the great work it has accomplished since 

 1897, the time of its establishment as a center of research in the zoology 

 and ethnology of the Congo. The same principle will apply to the dup- 

 lication of the American Museum photographs, observations, and 

 records of various kinds which may not be published. 



In other words, the American Museum will endeavor, so far as 

 practicable, in every branch of science in which this expedition has 

 engaged, to extend its duplicates and documents for the benefit of its 

 sister institution in Belgium and for the dissemination of knowledge 

 through the opportunities which the Congo Museum at Tervueren 

 offers to the European students and investigators. 



American Museum 

 of Natural History. 

 June 18, 1919. 



