xviii LIST OF ILLUSTRATIVE FIGURES. 



Fig. 83. Head of Conniioii Kuzorbill, rtainaiiiu Turda. Reduced one- 

 fourth, ----- putjc 34G 



84. Head of Arctic Puffin, Mormon arcticiis. Reduced one-fourth, 36<5 



85. Head of Great Cormorant, Phalacrocorax Carbo. Reduced, 380 



86. Head of Common Gannet, Sula Bassana. Reduced, - 405 



87. Head of Northern Fuhnar, Fulmarus glacialis. Reduced one- 



fourth, .... - 429 



88. Head of Cinereous Shearwater, ]'uffinus cinereus, - - 431 



89. Head of Common Stonu-Petrel, Thalassidroma pelagica, 4G0 



90. Head of Pomarine Skua, Cataracta Pomarina. Rodnccd ono 



fourth, ----- 487 



91. Head of Richardson's Jager, Lestris Richardsonii, - - 492 



92. Head of Ivory Whale-Gull, Gavia ebiirnea. Reduced one- 



fourth, ----- 508 



93. Head of Kittiwake, Rissa tridactyla, - - - 515 



94. Head of Great Black-backed Gull, Larus marinus. Reduced, 526 



95. Head of Glaucous Gull, Larus glaucus. Reduced one-third, 557 



96. Head of Leaden-grey-headed Mew, Gavia Atricilla. Reduced 



one-fourth, ----- 585 



97. Head of Brovni-headed Mew, Gavia ridibunda, - - 593 



98. Head of Sandwich Tern, Sterna Cautiaca. Reduced one- 



fourth, ----- 630 



99. Head of Common Tern, Sterna Ilirundo, - - 638 

 100. Head of Foolish Noddy, Megalopterus stolidus. Reduced one- 

 fourth, ----- 672 



