NATATORES. 387 



under tail-coverts nearly white ; primaries and tail blackish 

 brown ; irides brown ; bill yellowish brown, deepening into 

 black at the tip. 



Genus BRUCHIGAVIA, Bonaparte. ■ 



A genus of Gulls, the members of which are delicate in 

 their structure, elegant in their appearance, and graceful in 

 all their actions. One species is said to inhabit Brazil, 

 another Otaheiti, and two Australia. 



In habits, economy, and general appearance the members 

 of this genus are very similar to the Chroicoceplialus ridibimdics 

 of Europe, but at no season do they obtain any dark or black 

 colouring on the head. 



Sp. 597. BRUCHIGAVIA JAMESONII. 



Silver Gull. 



Crimson-billed Gull, Lath. Gen. Hist., vol, x. p. 145. 

 Larus jamesonii, Wils. 111. ZooL, pi. 23. 



scopulinus, Forst. Drawings, tab. 109, very young. 



nova-hollandia, Steph. Cont. of Shaw's Gen. Zool., vol. xiii. 



p. 196. 

 Silver Gull, Ewing, List of Birds in Tasmanian Journal, vol. i. p. 58. 

 Gelastes jamesoni, Bonap. Compt. Rend, de PAcad. Sci., torn. 41. 

 Bruchigavia jamesoni, Bonap. Comp, Gen. Av., torn. ii. p. 328; Bruchi- 



gavia, sp. 3. 

 Dje-je-nup, Aborigines of the lowland districts of Western Australia. 

 Little Gull of the Colonists of ditto. 



Xema jamesonii, Gould, Birds of Australia, foL, vol. vii. pi. 20. 



This beautiful species of Gull is abundantly dispersed over 

 the sea-shores of Tasmania and the southern coasts of Australia 

 generally ; it also frequents the rivers and inland lakes wher- 

 ever they occur of any extent. Like the other BrucUgiwics 

 it frequently congregates in immense flocks, and colonies of 

 many hundreds have been found breeding together, some- 



2 c 2 



