188 Phillips, Migration of Anatidoz in Massachusetts. [April 



the impressions made upon open-minded observers who have no 

 axe to grind, and who have no reason to take sides on the question, 

 one way or another. They have been written in a friendly spirit, 

 and we hope they will be received in the same way. 



TEN YEARS OF OBSERVATION ON THE MIGRATION 

 OF AN ATI D^: AT WENHAM LAKE, MASSA- 

 CHUSETTS. 



BY J. C. PHILLIPS. 



Wenham Lake is 20 miles northeast of Boston in the town of 

 Beverly and Wenham. It is one and one third miles in length, 

 and is divided into an upper and a lower basin. The lower basin 

 is larger and very much deeper, averaging across its middle portion 

 over fifty feet, with several deeper spots. The upper basin is 

 somewhat shallow with one very long cove, attractive to the sur- 

 face feeders. The pond is situated in a thickly settled region. 

 Along the eastern shore is a brightly lighted main road — Main 

 Street. At the south end are two large pumping stations, with tall 

 chimneys and numerous cottages. At the southeast corner and 

 at the north end are ice-houses. The whole western shore is wild, 

 mostly high land with white oak forest. In the fall the pumping 

 operations often lower the level of the lake ten or twelve feet. 



The pond weeds common to the lake, very kindly identified for 

 me by Mr. W. L. McAfee of the U. S. Biological Survey, are quill- 

 wort (Isoetcs echinospora, var. braunii) ; pondweed (Potamogeton 

 lucens and P. perfoliatus) , the "red head grass" of Currituck 

 Sound; Naias flexilis; Sagittaria teres; wild celery (Vallisncria 

 spirilis). This sheet of water is therefore well supplied with foods 

 attractive to ducks. 



The following list of Anatida 3 represents ten consecutive years 

 of gunning and of careful records at a point on the western shore 

 of the lake. 



