15 



LARUS ARGENTATUS, Herring Gull. 

 Abundant, spring, fall, and mild winters 

 when the river is not frozen, in nearly all 

 its different plumages. 



CoLYMBtrs TORQTTATUS, Great Northern 

 Diver. Bather common or not rare, sev- 

 eral specimens. 



COLYMBTJS SEPTENTRIONAUS, Red thrOdt- 



ed Diver.* A specimen in Mr. de Nott- 

 beck's collection, (Bull. Nutt. Orn. Club, 

 Vol. in, p. 146,) in young immature plum- 

 age ; and a second specimen taken in the 

 river some years later, are interesting rec- 

 ords, and new to science. 



PODICEPS CORNUTUS, Horned Grebe. A 

 young specimen had the whole under parts 

 silvery white, sides slightly ashy brown, all 

 the secondaries seven-eighths of an inch 

 white tipped. No lengthened feathers. 



PODILYMBUS PODICEPS, Piedbilled Grebe. 

 Not rare, spring and fall, several speci- 

 mens, and in full and immature plumage. 



