Fig. 10. The cryptogamic herbarium, showing part of the room in which the 

 collections of algae, mosses, and liverworts are housed. 



work in Guatemala, Ecuador, and Venezuela. In the early months 

 of the year much of the time of Dr. B. E. Dahlgren, Chief Curator of 

 the Department, was occupied with war emergency work. 



Publications of the Department issued during the year by the 

 Museum Press are listed on page 66. Besides these, various scien- 

 tific contributions were printed elsewhere. Curator Standley pub- 

 lished in several serials one short paper and several descriptions of 

 new species of flowering plants. Two papers by Dr. Drouet on new 

 species of cryptogams were published in the American Midland 

 Naturalist. Curator Williams furnished an account of the results 

 of his Venezuelan work in his Exploraciones Botdnicas en la Guyana 

 Venezolana, a well-illustrated volume of 468 pages, printed in 

 Caracas for the Servicio Botanico, Ministerio de Agricultura e Cria, 

 Venezuela. 



Installations and Rearrangements— Botany . . . 



A few notable additions were made to the botanical exhibits. 

 Most important was a habitat group of aquatic flowering plants of 

 the American tropics, consisting of the huge water lily Victoria 

 regia and its constant companions, a water hyacinth, an aquatic 



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