SYSTEMATIC INDEX 
Famity LARID/AK. 
Susp-Famity LARIN AL. 
SABINE'’S GULL, ee 
WEDGE-TAILED GULL... 
BONAPARTE’S GULL 
LirtLE Guu es 
BLACK-HEADED GULL... 
M&pDITERRANEAN BLACK- 
HEADED GULL 
GREAT BLACK-HEADED GULL... 
ComMMON GULL... 
HERRING-GULI. 533 
YELLOW-LEGGED H@ErRING- 
GULL 
LESSER BLACK-BACKED GULL... 
GREAT BLACK-BACKED GULL... 
GLAUCOUS GULL 
IGELAND GULL... 
KITTIWAKE GULL 
Ivory GULL ... Bac 
FAMILY 
GREAT SKUA ... 
POMATORHINE SKUA 
ARCTIC SKUA 
LONG-TAILED SKUA 
Nema sabinit 
Rhodostethia rosea 
Larus philadelphia 
Larus minutus 
Larus ridibundus 
Larus melanocephalus ... 
Larus ichthyaétus sae 
Larus canus nee ate 
Larus argentatus ae 
Larus cachinnans cau 
Larus fuscus 
Larus marinus ... 
Larus glaucus 
Larus lewcopterus 
Rissa tridactyla... 
Pagophila eburnea als 
STERCORARIIDZE. 
Megalestris catarrhactes 
Stercorarvus pomatorhinus 
Stercorarius crepidatus 
as Stercorartus parasiticus 
OrDER ALCA. 
Famity ALCIDA. 
Sus-Famity ALCIN A. 
Alca torda ee 
Alca impennis ... ate 
Uria trotwle Boe ee 
Uria bruennicht... 
Uria grylle noe 
Mergulus alle... 
RAZORBILL 
GreEAt AUK me 
COMMON GUILLEMOT ... 
BrUNNICH’S GUILLEMOT 
BLack GUILLEMOT 
LirrLeE AuK 
Sus-Faminy FRATERCULIN A. 
PUFFIN ... Fratercula arctica 
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