LARTIS. 213 



those of L. marinus, but the ground-colour is more varied, many 

 specimens being of a dark olive-buff. The markings are of the 

 same colour and character as in the eggs of L. marinus ; but it 

 may perhaps be said of them that they are, on the whole, coarser, and 

 that in a larger proportion of the eggs they form a very irregular 

 cap or zone at the large end. Specimens measure from 2'45 to 

 3-1 in length, and from I'S to 2-05 in breadth. 



3. Saldana Bay, S. Africa. Saunders Coll. 

 ->. S. Africa. Gould Coll. 



2. S. Africa. E. L. Layard, Esq. [P.]. 



1. Crozet Islands, S. Atlantic (Capt. Saunders Coll. 



Armson). 



1. Kerguelen Island, S. Atlantic. Voy. II.M.S. < Challenger.' 



23. Kerguelen Island, 8th Dec. (A. E. Royal Society [P.]. 



Eaton}. 



2. Kerguelen Island, 8th Dec. (Transit Saunders Coll. 



of Venus Exped.). 



(>. New Zealand. Sir George Grey [P.]. 



1. Island in Desire River, Patagonia, Saunders Coll. 



:!0th Nov. (/. McCormick}. 



2. Elizabeth Island, Straits of Magellan. Voy. H.M.S. 'Challenger.' 



1. Peckett Harbour, Straits of Ma- Dr.' Coppinger [P.]. 



gellan. 



13. Falkland Islands (C. C. Abbott). Gould Coll. 



4. Falkland Islands (C. C. A.). Salvin-Godman Coll. 

 2. Falkland Islands (C. C. A.). Saunders Coll. 



-2. Falkland Islands. Voy. H.M.S. ' Challenger.' 



] . Falkland Islands. McCormick Bequest. 



1. East Falkland. Lieut. A. Smith [P.]. 



Hybrid between L. argentatus and L. dominie-anus. 

 '2. Laid in confinement (Lilford Aviaries). Lord Lilford [P.]. 



Larus fuscus, Linn. 



Larus fuscus, Thien. Fortpflanz. ges. Voq. tab. Ixxxviii. fig. 4, a-f 

 (1846-64); Baedeker, Eier Eur. Vog. tab. 62. fig. 2 (1855-63); 

 Hewitson, Eggs of Brit. Birds, ii. p. 496, pi. cxxxix. fig. iii (1856) ; 

 Dresser, Birds Eur. viii. p. 421 (1873) ; Seebohm, Brit. Birds, iii. 

 p. 319, pi. 51 (1885) ; id. Eggs of Brit. Birds, p. 110, pi. 33. 

 tigs. 4, 5 (1896) ; Saunders, Cat. Birds B. M. xxv. p. 250 (1896) ; 

 Sharpe, Hand-l. i. p. 141 (1899). 



Like the eggs of L. ridibundus, those of the Lesser Black- 

 backed Gull are subject to great variation, the ground-colour 

 ranging from a plain pale blue to a rich olive-brown. The markings 

 are disposed on the shell in every conceivable pattern, from a few 

 spots only to masses of huge confluent blotches of a yellowish- 

 brown or blackish-brown colour. The eggs measure from 2-4 to 

 2'8 in length, and from 1/7 to 2 in breadth. 



3. Faroe Islands, 1st June (H. C. Seebohm Coll. 



Milller : Hargitt Coll.}. 

 3. Faroe Islands, 4th June (H. C. M. : Seebohm Coll. 



Hargitt Coll.). 



