PROCEEDINGS. XVII 



Dr. C. Hart Merriam read a paper detailing the RAVAGES OF 

 THE BOBOLINK IN THE RICE FIELDS OF THE SOUTH.* 



ONE HUNDRED AND TENTH MEETING, April 30, 1887. 



The President in the chair, and thirty-eight persons present. 



Dr. J. H. Kidder exhibited a rounded concretion-like mass 

 taken from the stomach of a codfish ; and also several rounded 

 grass balls from a small salt pond near Pyramid Lake, Nevada, 

 and explained their composition. These gave rise to much dis 

 cussion, and Mr. McGee, who had collected the grass balls, de 

 scribed the manner of their formation. 



Mr. F. A. Lucas spoke upon THE Os PROMINENS IN BIRDS. 



Mr. W. T. Hornaday read a paper entitled CIVILIZATION AS 

 AN EXTERMINATOR OF SAVAGE RACES, which led to some re 

 marks by Prof. Ward and Mr. Dall. 



Mr. W. H. Dall called attention to A GENUS OF BIVALVE MOL- 

 LUSKS NEW TO NORTH AMERICA. The genus is Cyrenella.^ 



ONE HUNDRED AND ELEVENTH MEETING, May 14, 1887. 



The President in the chair, and forty-two persons present. 



Prof. C. V. Riley presented some BIOLOGICAL NOTES ON 

 SOUTHERN CALIFORNIA, suggested by a recent trip to" that re 

 gion. Remarks were made by Dr. Vasey, Dr. Merriam, Prof. 

 Stearns, and Mr. Dall. 



Mr. P. L. Jouy exhibited specimens of A BIRD NEW TO JAPAN, 

 PITTA OREAS OF SWINHOE, from the island of Tsushima. 



Mr. F. H. Knowlton made a communication on THE RECENT 

 SHOWER OF POLLEN IN WASHINGTON, the so-called " sulphur 

 shower." The distance which pollen may be carried by the 

 winds gave rise to remarks by Dr. Vasey, Prof. Riley, and Prof. 

 Ward. 



* 1887. Published in part in Annual Rept. Dept of Agriculture for 1886, 

 pp. 246-250. 



t 1887. Amer. Jour. Sci.. xxxiv, p. 170. 



