Cambridge, Mass. 5 1909. March 16. head followed by a grayish body came into full view as the female Singular behaviour Gooseander sprang almost clear of the surface by a single vigorous of mated effort. After this she swam about sedately at the side of her mate as pair. long as I had the pair in view. I am wholly at a loss to account for this singular incident. When the female was quiescent I looked repeat- edly and carefully for her head without detecting any trace of it. I am inclined to believe that it was held under water most if not all of the time. I heard no vocal notes given by any of the Gooseanders today. 1/3