X Proceedings of the Biological Society of Washington. 



acquisition by the National Museum of the Hirase collection 

 of Japanese and Pacific Molluscs; Paul Bartsch, Note upon a 

 Mockingbird wintering in the city of Washington; R. W. 

 Shufeldt, Exhibition of File Fish from Argentina; T. S. Palmer, 

 Note upon the heights at which birds fly; H. M. Smith, Note 

 upon taking the Large Fork-tailed Swift, Micropus pacificus 

 (Latham) in the Pribilof Islands; A. H. Howell, Note upon the 

 abandonment of the Crow roost at Laurel, Md. L. O. Howard, 

 Conveyed the greetings of former President F. A. Lucas. 



Formal communications: L. H. Miller,* Asphalt Beds of 

 Rancho La Brea; H. C. Bryant,* Birds and Mammals of 

 Yosemite National Park. 



February 5, 1921— 620th Meeting.^ 



President Hollister in the chair; 50 persons present. 



New members were elected as follows: Glenwood C. Roe, 

 Maurice K. Brady. Deaths of Wm. J. Bennets and W. W. 

 Welsh were announced. 



Informal communications: H. M. Smith, Exhibit of artificial 

 pearls, and fish-scale material, and exhibit of the smallest and 

 youngest eel ever captured; R. W. Shufeldt, note upon frac- 

 tured bones in birds and mammals. 



Formal cominunications: Ivar Tidestrom, Notes upon the 

 Flora of the Iberian Peninsula; R. S. Bassler, Paleontological 

 Work at the National Museum. 



February 19, 1921— 621st Meeting.^ 



Vice-President Hitchcock in the chair; 48 persons present. 



O. M. Freeman was elected to membership. 



Informal communications: The Secretary read by title a 

 paper by S. Stillman Berry, entitled Notes on some Japanese 

 Cephalopods; L. O. Howard introduced Prof. E. S. Morse, 

 former president of the Boston Society of Natural History, who 

 addressed the Society. 



Formal communications: C. E. McClung, Chromosomes in 

 Relation to Heredity; Sewall Wright, Heredity as a Factor in 

 the Resistance of Guinea Pigs to Tuberculosis. 



1 Introduced by Dr. J. C. Merriam. 



zAbstract in Journ. Washington Acad. Sci., vol. 11, p. 315, July 10, 1921. 



3Abstract in Journ. Washington Acad. Sci., vol. 11, p. 316, July 10, 1921. 



