XJEUA. CREAGKUS. 203 



Sub-Family LARINtE. 



Genus XEMA, Leach. 



Xema sabinei (J. Sabine). 



(Plate XVIir. fig. 3.) 



Xema sabinii, Newton, P Z S. 1871, p. 57, pi. iy. fig. 5 ; Dresser, Birds 



n«^~r'-J- f^(1874); Nelson, Rep. Nat. Hist. Alaska, p. 56 



(IbS/); MacFarlane, Proc. U.S. Nat. Mus. xiv. p. 419 (1891): 



^ l.?(T899f ■ ^' ^' ''^'"' ^- ^^^ ^^^^^^ ' ^^""'^''' ^^'"^-'■^■ 



Xema sabini, Baird, Brewer ^- Pidgx,. Water Birds N. Am. ii. p. 



->69 



h^rnsj^hmn Seebohm Brit Bird,, iii. p. 298, pi. 54 (1885) : id. Eggs 

 of Brit. Birds p. 105, pi. 30. fig. 8 (1896). 



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

 Dut some are pynform. In coloration, they closely resemble the 

 eggs ot the bkuas. The ground is of a brown colour of various 

 shades, Imged with oUve. The markings consist of spots and smaU 

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

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

 tnese 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 f -62 to 1-95 in length, 

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



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



2. East of Anderson Eiver, Arctic Salvin-Godman CoU. 

 America {Henshaio Coll.) 



2. St. MichaePs Alaska, 6th June Salvin-Godman Coll. 



(J^. H . Nelson). 



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



Co/0 "' {Senshaw Salvin-Godman Coll. 



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

 [Lapt. Lolhnson). ^ 



3. Franklin Bay {R. MacFarlane. Saunders Coll. 

 H.JS .). 



Genus CREAGEUS, 5^. 

 Creagrus furcatus (Mboa.r). 

 (Plate XVI. fig. 3.) 

 Xema furcata, Saunders, Cat. Birds B M txv r. 16-5 nma\ . j? *j j 

 c5- Hartert, Nov. Zool. vi. p. 196 (1899)" ^" ^ ^^ ' ^"''"'^'• 



Creagrus furcatus, Sharpe, Hand-l. i. p. I39 (1899). 



The eggs of Xeboux's Gull are of a perfectly rec^lar oval form 

 alW S", T- ? r ^'S^^^-'-^^'"-^«lour or very pale bnfi', 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 a. in 



