/t^ . ■ ■ 
Xii CATALOGUE OF BRITISH BIRDS. 
Seasonal Occasional 
Indigenous. Visitors. Visitors. 
77. Stercorarius parasiticus, 253. 
95. Stercorarius cephus, 254. 
96. Larus glaucus, 255. 
97. Larus leucopterus, 256. 
108. Larus marinus, 256. 
109. Larus fuscus, 257. 
110. Larus argentatus, 257. 
111. Larus canus, 258. 
112. Larus ridibundus, 259. 
98. Larus minutus, 261. 
78. Eissa tridactyla, 262. 
99. Pagophila eburnea, 263. 
100. Sterna caspia, 264. 
79. Sterna cantiaca, 265. 
80. Sterna paradisea, 266. 
81. Sterna hirundo, 266. 
82. Sterna macroura, 267. 
101. Sterna anglica, 268. 
102. Hydrochelidon bybrida, 
269, 
103. Hydrochel. fissipes, 270. 
104. Hydrochelidon nigra, 270. 
83. Sula bassana, 272. 
113. Graculus carbo, 273. 
114. Graculus Linnaeii, 273. 
