VOL. XVI, PP. vii-xn. APRIL 18, 1904 



PROCEEDINGS 



THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



PROCEEDINGS. 



The Society meets in the Assembly Hall of the Cosmos Club on alternate 

 Saturdays at 8 P. M. Brief notices of the meetings, with abstracts of the 

 papers, are published in Science. 



January 10, 1903 364th Meeting. 



The President in the chair and 54 persons present. 



Walter Evans spoke of a forest reserve which was about to be established 

 in northeastern Porto Rico. 



The following communications were presented : 



L. O. Howard : Exhibition of Lantern Slides Illustrating Yellow Fever 

 Investigations in Cuba. 



S. E. Meek : The Geographic Distribution of the Fresh-water Fishes of 

 Mexico. 



O. P. Jenkins : Rate of the Nervous Impulse in Certain Invertebrates. 



January 24, 1903 365111 Meeting. 



The President in the chair and 27 persons present. 



William Palmer exhibited specimens of Camptosorus rhizophyllus, showing 

 irregularities in the form of the base. 



T. D. A. Cockerell recorded three species of fish new to the Territory of 

 New Mexico. 



The following communications were presented : 



A. D. Hopkins : Work of Forest Insects. 



0. F. Cook : An Ordinal Character in the Diplopoda. 



O. F. Cook : Evolution, Cytology, and Mendel's Laws.* 



*Pop. Sci. Monthly, LXIII, pp. 219-228, July, 1903, 



(vii) 



