CONTENTS. XXIX 



Page 



Subfamily LARIN^E 186 



Genus PAGOPHILA 186 



Pagophila eburnea. Ivory Gull 186 



Genus RISSA 187 



Rissa tridactyla. Kittiwake 187 



Genus LARUS 187 



Larus glaucus. Glaucous Gull 187 



Larus leucopterus. Iceland Gull 188 



Larus argentatus. Herring-Gull 188 



Larus fuscus. Lesser Black-backed Gull 189 



Larus canus. Common Gull 189 



Larus rnarinus. Greater Black-backed Gull 189 



Larus atricilla. Laughing Gull 190 



Larus ichthyaetus. Great Black-headed Gull 190 



Larus melanocephalus. Adriatic Gull 191 



Larus ridibundus. Black-headed Gull 191 



Larus minutus. Little Gull 191 



Larus Philadelphia. Bonaparte's Gull 192 



Genus RHODOSTETHIA 192 



Rhodostethia rosea. Cuneate -tailed Gull 192 



Genus XEMA 193 



Xema sabinii. Sabine's Gull 193 



Subfamily STERCORARIIN^E 193 



Genus STERCORARIUS 193 



Stercorarius catarrhactes. Common Skua 194 



Stercorarius pomatorhinus. Pomatorhine Skua 194 



Stercorarius crepidatus. Richardson's Skua 195 



Stercorarius parasiticus. Buffon's Skua 195 



Order TUBINARES iw 



Family PROCELLARIID^] 196 



Genus PROCELLARIA 196 



Procellaria pelagica. Storm-Petrel 196 



Procellaria leucorrhoa. Leach's Petrel 196 



Genus OCEANITES 197 



Oceanites oceanicus. Wilson's Petrel . . . 197 



