248 LARID^. 



■webs. Total length 23 inches, culmen 2'25, iving 16-5, tail 7, 

 tarsus 2*4, middle toe with claw 2'o. 



The female is smaller and has a less robust bill ; there is, how- 

 ever, miich individual variation irrespective of sex. For example, 

 there is as much difference between birds obtained on the Island of 

 Kerguelen alone, as there is between examples from all the rest 

 of the area frequented by the species. 



Itmncture. Browner on the mantle and wings ; the primaries with 

 hardly any white at their tips up to the 6th ; tail mottled subter- 

 minally with dark brown ; head and neck streaked with greyish 

 brown ; bill paler in colour. 



Young. Mottled dark brown above and streaked with paler brown 

 below (much darker than in L. marinus and more resembling this 

 stage of L. fiisais, the next species) ; tail-coverts barred with 

 brown ; rectrices nearly uniform dark brown, with very little 

 mottling during the first year ; bill dark horn-colour ; tarsi and toes 

 brown. At a later stage some black begins to show on the 

 mantle and the tail-coverts are white ; the bill pale yellow, with 

 a blackish band across the angle. The successive changes of 

 plumage are much as in the preceding species and probably take 

 about the same number of years. 



Nestling. Very like that of L. nuirinns, but with a somewhat 

 darker tint of greyish and less buff ; tarsi and toes lead-colour. 



Hah. South America, from lat. 10° S. to the Antarctic regions; 

 the Falklands and South Georgian Islands; South Africa; the 

 Crozet Islands and Kerguelen*; New Zealand and islands to the 

 southward. 



a. luim. sk. Callao Bay, Peru, Aug. Fl. Saunders Coll. 



(Adml. A. H. Markhayn). 



b. Juv. sk. San Lorenzo, Callao Bay, H. Saunders Coll. 



Aug. ( Covimr. MacFar- 

 lane, R.N.). 



c. Ad. sk._ Islay, Peru {S. F. Eoidand). H. Saunders Coll. 



d. e. 2 irum. et Coquiuibo, Chile, Nov. H. Saunders CoU. 

 juv. sk. (Adml. A. H. Markhmn). 



f. S ad. sk. Laraquete, C'liile, Auff. H. B. James, Esq. 



[P.]. 

 n.h. (^ ad.; ?. Juv. \aIparaiso Bav, Chile, Aug. H. B. James, Esq. 



sk. ' [P.]. 



k. Ad. ; /. Juv. st. Valparaiso Bay, Chile, Aug. Sir W. Burnett & 



Capt. Fitzroy, 

 E.N. [P.]. 

 OT.Ad.sk. Valparaiso, Chile. Capt.W.S.Bvett[P.]. 



71. Ad. sk. Valparaiso, Chile (Gervase H. Saunders Coll. 



iMatheic, S.K). 

 o, p. Ad. sk. Valparaiso, Chile (F. C. H. Saunders Coll. 



Fead). 

 q. 5 sk. Valparaiso, Chile, Aug. {Dr. Voy. H.M.S. 'Alert.' 



Coppinger). 



* I do not find this species recorded from Tristan da Cuuha, Prince 

 Edward I., or Marion I. 



