754 PROCEEDINGS OF THE ACADEMY OF [NoV., 



trict," 1884; ''Cambrian Faunas of North America/' 1885 and 1886; 

 "The Famia of the Lower Cambrian, or Olenellus, Zone," 1890; "Cor- 

 relation of Cambrian Formations/' 1891; "Algonkian Rocks of the 

 Grand Canyon of the Colorado/' 1895. 



Honorary Curator, Department of Paleontology of the U. S. National 

 Museum, 1892-1897, and since 1898; from January, 1897, to July, 1898, 

 at head of U. S. National Museum, with title of Acting Assistant Secre- 

 tary of the Smithsonian Institution ; Secretary of the Carnegie Institu- 

 tion of Washington, 1902, and since. Received the degree LL.D. 

 from Hamilton College, 1897; University of Chicago, 1901; Johns Hop- 

 kins University, 1902; University of Pennsylvania, 1903. 



November 21. 



The President, Samuel G. Dixon, M.D., in the chair. 



Thirty-eight persons present. 



The deaths of the following persons were announced : 



Albert von Richtofen, a Correspondent, October 29, 1905 ; Albert 

 von Kolliker, a Correspondent, November 3, 1905 ; George R. More- 

 house, M.D., a member, November 12, 1905 ; Allen Shryock, a mem- 

 ber, November 12, 1905. 



Behavior of Sea Anernones. — Dr. H. S. Jennings gave an account 

 of studies on the behavior of sea anemones, made at the Tortugas 

 Laboratory of the Carnegie Institution. Special attention was given 

 to the modifiability of behavior. The speaker showed that these low 

 organisms by no means always react in the same way to the same 

 external conditions. On the contrary, their reactions are modifiable 

 from a variety of causes. Changes in the internal physiological ])ro- 

 cesses, former stimuli that have affected the animal, former reactions 

 performed by the animal, and a number of other factors, all assist in 

 determining the present action of the organism. There is a clearly 

 marked tendency, in some cases, to repeat an action in the w^ay it has 

 been performed before. These various factors give a high degree of 

 complexity and adaptiveness to the behavior of even these low 

 animals. 



C. H. Smyth, Jr., was elected a member. 



The following were ordered to be printed : — 



