10 
02 PQ 
2 a 
SCO 
bO L4 
3 
57. Arctic, or Richardson's Skua. 
Stercorarius crepidatus (Gmel.) . . . 
58. Long--tailed, or Buffon's Skua. 
Stercorarius parasiticus (Linn.) 
59. Pomatorhine Skua. 
Stercorarius pomatorhinus (Temm.) 
FAMILY LARIDM. 
60. Ivory Gull. 
Pagophila eburnea (Phipps) . . 
61. Kittiwake. 
Rissa tridactyla (Linn.) 
62. Common Gull. 
Larus canus, Linn. 
63. Herring-Gull. 
Larus argentatus, Gmel. 
64. Yellow-legged Herring-Gull. 
Larus cachinnans, Pall 
Once ; Breydon Water, 4th November, 
1886. cf. Saunders, p. 674. 
65. Lesser Black-backed Gull. 
Larus fuscus. Linn 
66. Greater Black-backed Gull. 
Larus marinus. Linn 
67. Glaucous Gull. 
Larus glaucus, Fabricius 
