000 Recent Literature. [April 



Duerden, J. E. Methods of Degeneration in the Ostrich. (Jour, of 

 Genetics, IX, No. 2, pp. 131-193, Plates V-VI.) 



Soderberg, Rudolf. Results of Dr. E. Mjoberg's Swedish Scientific 

 Expeditions to Australia, 1910-1913, XIII. Studies of the Birds in 

 Northwest Australia. (Kungl. Svensk. Vetensk. Handl., 52, No. 17, 

 pp. 3-116, pi. I-IV, 1918.) — An extended report with many text figures. 

 No new forms are described. [In English.] 



Kruimel, J. H. Investigations on the Feathers of Gall'naceous Birds. 

 (Bijd. tot. de Dierkunde Amsterdam, XX, pt. 2, pp. 1-93, pi. I-IV, 1916.) 

 An exhaustive study of structure, coloration, etc. [In Dutch.] 



Thysse, J. P. On Bird Song. (Ibid. XXI, pp. 119-122.) [In Dutch.] 



Portielje, A. F. J. Biological Observations in the Garden of the 

 Royal Zoological Society. (Ibid. XXI, pp. 137-144, pi. III.)— Downy 

 young of Ardea goliath, Pseudogeranus leucanchen and Calharista are 

 shown with their parents in the plate. [In Dutch.] 



Additional Publications Received. — Richmond, C. W. In Mem- 

 orium. Edgar Alexander Mearns. Smithsonian Report for 1917. Re- 

 printed from 'The Auk,' 



American Bird House Journal. J. W. Jacobs, Waynesburg, Pa. 

 IV, No. 1, January, 1919. 



Bird Notes and News. VIII, No. 8. Winter, 1919. 



Bulletin of the Charleston Museum. XV, No. 8, and XVI, No. 1. 

 December, 1919, and January, 1920. 



Fins Feathers and Fur. No. 20, December, 1919. 



Florida Audubon Bulletin. Florida Audubon Society, Winter Park, 

 Fla. I, No. 3. October, 1919. 



New Jersey Audubon Society. Ninth Annual Report. October, 

 1919. 



Scottish Naturalist. Nos. 95-96. November-December, 1919. 



Philippine Journal of Science. XIV, Nos. 5 and 6, and XV, Nos. 



1 and 2. May-August, 1919. 



Records of the Australian Museum. XII, No. 12. December, 

 1919. 



