Proceedings. xiii 



November 6, 1915— 544th Meeting.* 



President Bartsch in the chair and 90 persons present. 

 Three communications were presented : 

 "A New Pleistocene Sloth from Texas "; O. P. Hay. 

 " Botanical Explorations in South America"; J. N. Rose. 

 "Some Biological Pictures of Oahu (Hawaii)"; L. O. 

 Howard. 



November 20, 1915— 545th Meeting.! 



President Bartsch in the chair and 50 persons present. 



Mr. Lewis Radcliffe made remarks on the rearing of shad in 

 ponds and exhibited specimens. 



Three communications were presented : 



" The Dispersal of Some Species of Flies " ; Frederick Knab. 



" Notes on the Habits of the Duck Hawk " ; Alex Wetmore. 



" Geographical Relationships of the Philippine Flora " ; El- 

 mer D. Merrill. 



December 4, 1915— 546th Meeting, t 



President Bartsch in the chair and 55 persons present. 



Resolutions with respect to the death of George M. Sternl)erg, 

 former President of the Biological Society, were read and 

 adopted. 



Dr. O. P. Hay made remarks on a fossil walrus and exhibited 

 a specimen. 



Dr. L. 0. Howard made remarks on the cluster fly. 



Two communications were presented: 



"Identification of the Stages in the Asexual Cycle of Bertonella 

 hacilliformis, the Pathogenic Organism of Verruga, and their 

 Bearing on the Etiology and Unity of the Disease"; Charles 

 H. T. Townsend. § 



" Mississippi River Dam at Keokuk, its effect on Biological 

 Conditions, especially those of the Plankton "; A. A. Doolittle. 



•Abstracts in Journ. Washington Acad. Sci., Vol. 6, p. 24, January 4, 1916; and in 

 Science, N. S., Vol. 42, p. 880, December 17, 1915. 



t Abstracts in Science, N. S., Vol. 43, pp. 75-76. Januiiry 14. 1916. 



t Abstracts will shortly appear in tlie Journal of the Washington Academy of 

 Sciences, and in Science. 



§ Journ. Washington Acad. Sci., Vol. 5, pp. 662-667, December 19, 1915. 



