XEMA. — CEEA&EUS. 203 



Sub-Family LARTNiE. 



Genus XEMA, Lea^Ti. 



Xema sabinei (J. Sabine). 



(Plate XVIII. fig. 3.) 



Xema sabinii, Newton, P. Z. S. 1871, p. 67, pi. It. fig. 5 ; Dresser, Birds 

 JBhtr. viii. p. 337 (1874) ; Nelsm, Rep. Nat. Hist. Alaska, p. 56 

 (1887) ; MacFarlane, Proc. U. S. Nat. Mus. xiv. p. 419 (1891) ; 

 Saunders, Cat. Birds B. M. xxv. p. 162 (1896) ; Sharpe, Hand-l. i. 

 p. 139 (1899). 



Xema sabini, Baird, Brewer & Sidgw. Water Birds N. Am. ii. p. 269 

 (1884). 



Larus sabinii; Seebohm, Brit. Birds, iii. p. 298, pl. 64 (1886) ; id. Eggs 

 of Brit. Birds p. 105, pi. 36. flg-. 8 (1896). 



The eggs of Sabine's Gull are usually of a pointed oval form, 

 but some are pyriform. In coloration, they closely resemble the 

 eggs of the Skuas. The ground is of a brown colour of various 

 shades, tinged with olive. The markings consist of spots and small 

 blotches, are pale and indistinct, and are pretty evenly distributed 

 over the whole shell, but in a few specimens there is a tendency for 

 these to form a zone or imperfect cap at the larger end. The 

 surface-markings are brown ; and the underlying markings greyish 

 brown. Numerous examples measure from ]"62 to 1'95 in length, 

 and from 1-17 to 1-33 in breadth. 



5. North America (Henshaw Coll.). Salvin-Godman CoU. 



2. East of Anderson Kiver, Arctic Salvin-Godman OoU. 

 America (JSenshaw Coll.). 



2. St. Michael's, Alaska, 6th June Salvin-Godman Coll. 



{H. W. Nelson). 



3. St. Michael's, 13th June (_JS. W. N). Salvin-Godman Coll. 



2. St. Michael's, 6th June {Henshaw Salvin-Godman OoU. 



Coli:). 

 1. Cambridge Bay, Arctic America Voy. H.M.S. ' Enterprise.' 

 (Capt. Collinson). 



3. Franklin Bay (M. MacFarlane, Saunders Coll. 



R.N.). 



Genus CREAGRUS, Bp. 



Creagrus furcatus {Nebmx). 



(Plate XVI, fig. 3.) 



Xema furcata, Saunders, Cat. Birds B. M. xxv. p. 165 (1896) ; Rothsch. 



^ Hartert, Nov. Zool. vi. p. 196 (1899). 

 Creagrus furcatus, Sharpe, Hand-l. i. p. 139 (1899). 



The eggs of Neboux's Gull are of a perfectly regular oval form. 

 The ground is of a light cream-colour or very pale buff', occasion- 

 ally with a faint tinge of green. The underlying markings are 

 numerous, large, and of a pale purple colour. The surface-markings, 

 consisting of spots and large blotches of deep chocolate-brown or 

 blackish brown, are evenly distributed over the shell, but as in 



