312 



s"-u" . cJ 2 ad. sk. 



v". (S ad. sk. 



w''. d ad. sk. 



x". Juv. sk. 



y", z". 2 fid. sk. 

 a^. Ad. sk. 

 b\ Ad. sk. 

 c^. Skeleton. 



(P. Skeleton. 

 e^,f^. Skeletons. 



f/^. Sternum. 

 h^. Sternum. 

 P. Skeleton. 



St. George Id., rrybiloff Group 



(H. W. Elliott). 

 St. Paul's Id., Prybiloff Group, 



Sept. (H. W.E.). 

 St. Paul's Id., Prvbiloff Group, 



Aug. {K. W.E.). 

 Walrus Id., Prvbiloff Group 



{G.M. Adanis). 

 Kuril Islands {Snow). 

 Kuril Islands, summer (Snow). 

 Kuril Islands, summer {Siioxo). 

 England (died in Zool. Gard.). 



Helsingfors. 

 Spitsbergen, June 1894. 



England. 



Europe. 



(Imperfect.) 



Salvin-Godmau Coll. 



H. Saunders Coll. 



Salvin-Godman Coll. 



Salvin-Godman Coll. 



Seebobm Coll. 

 H. Saunders Coll. 

 Capt. Blakiston [P.]. 

 Zoological Society 



LP-]- 



Dr. A. Giinther [P.]. 

 Col. H. W. Feilden 



[P.]. 

 John Eay, Esq. [P.]. 

 Purchased. 

 Salvin-Godman Coll. 



2. Rissa brevirostris. 



Larus brachyi-hvnchus (nee Richardson, 1831), Gonld, P. Z. S. 1843, 



p. 106; id. Voii. 'Sulphur; p. 50, pi. 34 (1844). 

 Rissa nivea (ncc L. niveus. Fall.), Gray, List B. Brit. Mns., Anseres, 

 p. 174 (1844 : N.W. America) ; id. Gen. B. iii. p. 6-55 (1846) ; 

 Eeichenb. Novit. Natat. tav. cclxix. fig. 22-54 (1850) ; Bp. C. R. 

 xlii. p. 771 (1856); Baird, Cass., ^- Later., B. N. Amer. p. 855 

 (1858) ; B. G. Elliot, New Sr Unfig. B. N. Amer. ii. pi. 54 (1869) ; 

 Larus brevirostris, Bnwh,J.f. O. 1853, p. 103; id. op. cit. 1855, 

 p. 285 (critical) ; Cows, Key N. Amer. B. p. 315 (1872) ; id. in 

 H. W. Elliotts Rep. Pryhiloff Is., Birds, no. 553 (1873); H. W. 

 Elliott, Monog. Seal Is. Alaska, p. 133 (1882). 

 Icarus (Rissa) brevirostris, Cmtes, B. N.- West, p. 646 (1874). 

 Larus citrirostris, Brtich, J.f. O. 1855, p. 284 (Kamtschatka). 

 Ri.s.sa brachyrln'ncha, Bp. Consp. Av. ii. p. '22(j (1857) ; Coues, Pr. 

 Philad. Acad. 1862, p. 306 ; Gray, Hand-l. B. iii. p. 117, no. 11018 

 (1871). 

 Larus warnecki, Coinde, Rev. et May. Zool. 1860, p. 401 (Aleutian 



Islands). 

 Rissa brevirostris, Baird, Cass., ^~ Larvr. B. N. Amer. d. 855 (1858) ; 

 Ball ^- Bonn. Tr. Chic. Ac. i. p. 305 (1869: Alaska); Saunders, 

 P.Z. S. 1878, p. 164 (revision) ; id. Journ. Linn. Soc. xiv. p. 394 

 (1878 : distribution) ; Ridqio. Bull. U.S. Nat. Mus. no. 21, p. 51 

 (1881) : Coues, Check-l. N. Amer. B. p. 122 (1882) ; Nelson, 

 Cruise ' Corwi7i,' p. 105 (1883 : Bering Sea ; cf. Stejn. Auk, 1884, 

 p. 358) ; Coues, Keif N. Amer. B. 2nd ed. p. 748 (1884) ; Baird, 

 Breiver, ^- Ridyjv. Water-B. N. Anwr. ii. p. 207 (1884) ; Stejn. 

 Bull. U.S. Nat. Mus. no. 29, p. 82 (1885: Commander Is.); 

 Turnei; Auk, 1885, p. 158 (Alaska) ; A. O. U. Check-l. N. Amer. 

 B. p. 87 (1886); Ridyiv. Man. N. Amer. B. p. 25 (1887) ; Allen, 

 Auk, 1803, p. 123 (distribution) ; Taczan. 3Iem. Acad. St. Petersb. 

 xxxix. p. 1053 (1893 : E. Siberia). 



Adult in hreedinri-plumage. Similar to the preceding species, but 

 darker slate-grey on the mantle, as well as ou the upper portious of 



