RISSA. LARUS. 187 



Genus EISSA, Stephens in Shaw's Gen. Zool. xiii. pt. 1, 



p. 180 (1835). 



Bissa, probably latinized and softened from the Icelandic Bitsa (Briinnloh, 

 Omith. Boreal. 1764, p. 42). Derivation unknown, 



Rissa tridactyla. Kittiwake. 



Larus tridactylus, LAnneeus, S. N. i. p. 234(1766). 

 Larus tridactylus, Naum. x. p.' 332; Hewitson, p. 493; 



Yarr. ed. 2, iii. p. 562; id. ed. 3, iii. p. 581 ; Hurting, 



p. 77. 

 Rissa tridactyla, Macg. v. p. 515 ; Gray, p. 236 ; Gould, v. 



pi. 61 ; Dresser, viii. p. 447. 

 The Kittiwake Gull, Yarr. ed. 1, iii. p. 444. 



THdactyla = TpiSaxrvKos, three-toed ; from rpeis + SciktvKos. 



A regular visitant, especially abundant in the summer 

 months about the northern and precipitous portions of the 

 British coasts : it is consequently of local distribution. It 

 inhabits the Arctic and Subarctic regions, being partially 

 migratory in winter. 



Genus LARUS, Linnaeus, S. N. i. p. 224 (1766). 



Larus = Xa'pos, a ravenous sea-bird, in classical Greek. Akin to Old Norse 

 ttri = a Tern. 



Larus glaucus. Glaucous Gull. 

 Larus glaucus, Fabricius, Faun. Grcenl. p. 100 (1780). 



Larus glaucus, Naum. x. p. 350; Macg. v. p. 557; Hewitson, 

 p. 504; Gray, p. 330; Yarr. ed. 3, iii. p. 595; id, 

 ed. 3, iii. p. 614; Gould, v. pi. 57; Hariing, p. 77; 

 Dresser, viii. p. 433. 



The Glaucous Gull, Yarr. ed. 1, iii. p. 475. 



Glaucus = yXavKos, bluish-grey. 



A winter visitant, sometimes in considerable numbers, 

 especially to the northern portions of the United Kingdom. 



