SUPPLEMENTARY LIST. 
July 1 to December 31, 1921. 
2. Holboell's Grebe. September 8. 
3. Horned Grebe. November 16. 
6. Pied-billed Grebe. August 14 to November 11. 
7. Loon. August 28. 
11. Red-throated Loon. September 8. 
34. Dovekie. November 29. 
43. Iceland Gull. December 11. 
47 Great Black-backed Gull. July 11. 
51. Herring Gull. Usual numbers. 
58. Laughing Gull. Plum Island, September 8. J. W. 
Goodridge. 
60. Bonaparte's Gull. July 24 to December 1. 
70. Common Tern. October 12. 
71. Arctic Tern. Ipswich Beach, July 31. S. G. Emilio. 
72. Roseate Tern. Ipswich Beach, July 31. S. G. Emilio. 
74. Least Tern. Plum Island, September 8. J. W. Good¬ 
ridge. 
106. Leach's Petrel. Found alive on Lyman street, Lynn, 
and given to Game Warden Thos. Burney, July 11. 
Identified by A. P. Stubbs. 
109. Wilson's Petrel. July 11 to September 4. 
117. Gannet. September 4 to October 9. 
120. Double-crested Cormorant.. August 27 to October 9. 
129. Merganser. November 23. 
130. Red-breasted Merganser. Bred in Essex Co., 1921. 
133. Red-legged Black Duck. In usual numbers. 
133a. Black Duck. Bred well in 1921. 
137. Baldpate. Hamilton, September 18. J. W. Goodridge. 
139. Green-winged Teal. September 4 to November 13. 
143. Pintail. Ipswich, Aug. 20 to Oct. 2. Dr. Townsend. 
144. Wood Duck. October. 
146. Redhead. October 30 to November 13. 
148. Scaup. September 8. 
40 
