13, XEMA. 



165 



i. 2 vix ad. sk. Cumberland Gulf, Baffin Ld., 



June loth, 1884 (J. Hen- 

 derson), 



h. 2 ad. sk. Arctic Coast, east of Fort 



Anderson, July (breeding) 

 {R. R. MacFarlane). 



l,m. Ad.sk. Cambrid<re Bay, Victoria Ld., 



{R. Anderson, R.M.S. 

 'Enterprise'). 



n, o. Vix ad. sk. North-west America, sum- 

 mer. 



p. Ad. sk. Stewart I., Alaska, July 



{E. W. Nelson). 



q, c? ad. sk. St. Michael's, Alaska [L. M. 



Turner). 



T-i'. (f ? ad., vix St. Michael's, Alaska, June 

 ad., et juv. sk. {E. W. Nelson). 



k'. $ ad. sk. St. Michael's, Alaska, June 



(E. W. Nelson). 



v. S ad. sk. Corpus Christi, Texas, Oct. 



(F. B. Armstronrj). 



m', n'. 2 vix ad. Callao Bay, Peru, Dee. 1881 

 sk. (Admiral A. H. Mark- 



ham). 



o', p' . Vix ad. sk. Callao Bay, Peru, April 

 {Commr. J. R. H. MacFar- 

 lane). 



q. Skeleton. " Arctic Seas." 



2. Xema furcata *. 



H. Saunders Coll. 

 Salvin-Godman Coll. 



Capt. Collinson, R.N. 



[P.]. 



Capt. Kellett, R.N., 



C.B. [P.]. 

 Salvin-Godman Coll. 



Salvin-Godman Coll. 



Salvin-Godman Coll. 



H. Saunders Coll. 



Salvin-Godman Coll. 



H. Saunders Coll. 



H. Saunders Coll. 



Purchased. 



Mouette a queue fourchue, N&houx, Rev. Zool. 1840, p. 290. 



Larus furcatus, Nebou.r, Voy. ' Venus,' Atlas, pi. x. (1846) ; Prevost 



Sf Des Murs, Voij. ' Venus,' Ois. p. 277 (1855). 

 Xema furcatus, Bruch, J.f. O. 1853, p. 10.3 (revision). 

 Creagrus furcatus, Bp. Naumannia, 1854, p. 213 ; id. C. R. xlii. 



p. 771 (1856) ; Bruch, J. f. O. 1855, p. 292 ; Baird, Cass., ^ 



Laiur. B. N. Amer. p. 857 (1858 : not in California) ; Salvin, 



Trans. Zool. Soc. ix. p. 506 (1876 : Galapagos Is.) ; Ridgio. Bull. 



U.S. Nat. Mus. no. 21, p. 52 (1881) ; id. Pr. U.S. Nat. Mus. 



xii. p. 117 (1889 : Chatham I., Galapagos Group) ; Lucas, Pr. 



U.S. Nat. Mus. xiii. p. 130 (1891 : skeleton, Chatham I.) ; Ridgiv. 



t. c. p. 311 ; Edd. Auk, 1891, p. 88 & p. 402 (Chatham I.). 

 Xema furcatum. Gray, Hand-l. B. iii. p. 117, no. 11014 (1871) ; 



Coues, Key N. Amer. B. p. 317 (1872); id. B. N.-West, p. G61 



(1874); Saunders, P. Z. S. 1878, p. 213 (revision); id. op. cit. 



1882, p. 523, pi. xxxiv. (Paracas Bay, Peru) ; Taczan. Orn. Perou, 



iii. p. 457 (1886). 

 Xema furcata, Coues, Check-l. N.-Ainer. B. p. 122 (1882) ; id. Key 



N. Amer. B. 2nd ed. p. 753 (1884) ; Baird, Breicer, Sf- Ridgio. 



Water-B. N. Amer. ii. p. 273 (1884) ; Ridgw. Man. N. Amer. B. 



p. 38 (1887). 



* At one time Gray and others seem to have believed that the word XeTna 

 was a genuino Greek substantive, neuter ; but it appears to be a purely fanciful 

 word with au apparently feminine termination. 



