North American Birds Eggs. 5 



34 Alle alle r 752. c 863 



Dovekie 1.25 



35 Megalestris skua r 693. c 764 



Skua .50* 



36 Stercorarius pomarinus r 697, c 765 



Pomarine Jaeger 2. HO* 



37 Stercorarius parasiticus r 698. c 766 



Parasitic Jaeger .50* 



33 Sfcsrcorarius longicaudus r 6J3, c 787 



Long-tailed Jaeger 1 .50* 



33 Gavia alba r 657, c 785 



Ivory Gull 5.00* 



40 Rissa tridactyla r 658, c 782 



Kittiwake .40* 



40 Rissa tridactyla pollicaris r 85S, c 783 



Pacilic Kittiwake 1.50 



41 Rissa brevirostris r 659, c 784 



Red-legged Kittiwake 1.50 



42 Larus glaucus r 660. c 768 



Glaucous Gull .75* 



42.1 Larus barrovianus 



Point Barrow Gull 2.00 



43 Larus leucopterus r 661, c 769 



Iceland Gull 1.25* 



4t Larus glaucescens r 632, c 770 



Glaucous- winged Gull 1.00 



45 Larus kumlieni 



Kumlien's Gull 3.00 



4 Larus nelsoni 



Nelson's Gull 



47 Larus marinus r 633. c 771 



Great Black-backed Gull .00 



48 Larus schistisgus 



Slaty-backed Gull 



49 Larus occidentalis r 684. c 774 



Western Gull .30 



[50] Larus afflnis r 665. c 775 



Siberian Gull 

 51 Larus argentatus r 666, c 772 



Herring Gull .20* 



51 a Larus argentatus smithsonianus r 666. c 773 



American Herring Gull .20 



