260 
CATALOGUE OF BRITISH BIRDS. 
B, Vert, An. p. 272 ; Keys, ^ Bl, Wirhelth, Eur. p. 96 ; Naum, 
Vog, Deuts, (1840) x. p. 264, t. 260 ; Schleg, Rev, Crit. des Ois, 
d’Eur, p. 126; G, R, Gray^ Gen, of B, iii. p. 654. 
Larus cinerarius, Linn, S, N, i, p. 224. 
Lams canescens, Bechst, Naturg, Deuts, iv. p. 649. 
Lams erythropus, Gmel, S, N, i. p. 597. 
Lams procellosus, pt., Bechst, Naturg. Deuts. iv. p. 647. 
Xema ridibundus, Boie^ Isis (1822), p. 563; Brehm^ Vog. Deuts. 
p. 760. 
Xema pileatum, Brehm^ Vog. Deuts. p. 761, t. 37, f. 4. 
Chroicocephalus ridibundus, Eyton^ Cat. Brit, B. p. 53. 
Gavia ridibuiida, Kaup^ Naturl. Syst. p. 99 ; Macgill. Man. N, H. 
Ornith, ii. p. 240. 
Larus atricilla, Pall. Zoogr, ii. p. 324. 
Larus naevius, Pall. Zoogr. ii. p. 327. 
Black-headed Gull, Mont. Orn. Diet,; Bew, Brit. B, (1804) ii. p. 
222, fig.; Penn. Brit. Zool, (1812) ii. p. 189; Selby, Brit. Orn, 
ii. p. 487; Yarr. Brit, B. 2 edit. iii. p. 550, fig. 
Brown-headed Gull, Mont. Orn, Diet,; Bew. Brit. B. (1804) ii. 
p. 226. 
Red-legged Gull, Mont, Orn, Diet,; Penn. Brit, Zool. (1812) ii. 
p. 192. 
Black-headed Gull, variety, Penn. Brit. Zool. (1812) ii. p. 191. 
PI. enl, 969, 970 ; Gould, B, of Eur. pi. 425. 
a. Devonshire. From Col. Montagu’s collection. 
h, c. Carmarthenshire. From Col. Montagu’s collection. 
d. Orkney Islands. From Mr. Bullock’s collection. 
e, f. Hills of Hoy, Orkney. From Mr. J. Baker’s collection. 
g. Hills of Hoy, Orkney. From Mr. J. Baker’s collection. 
g. Sternum. England. Presented by T. Ingall, Esq. 
9. Larus capistratus. The Masked Gull. 
Lams capistratus, Temm, Man. d’Orn. (1820) ii. p. 785 ; Steph, 
Gen. Zool. xiii. p. 204 ; Flem. Brit. An, p. 143 ; Jenyns, Man. 
i?. Vert. An. p. 272. 
Lairus ridibundus, pt.. Keys. ^ Bl. Wirhelth. Eur. p. 95; Naum. 
Vog. Deuts. (1840) x. p. 264 ; G. R. Gray, Gen. of B. iii. p. 654. 
Larus ridibundus minor, Schleg. Rev. Crit. des Ois. d'Eur. p. 127. 
Xema capistrata, Boie, Isis (1822) p. 563 ; Brehm, Vog. Deuts. p. 
762. 
Chroicocephalus capistratus, Eyton, Cat. Brit. B. p. 53. 
Gavia capistrata, Kaup, Naturl. Syst. p. 99. 
