RISSA. LARUS. 187 



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

 p. 180 (1825). 



Eissa, probably latinized and softened from the Icelandic Ritsa (Brlinnich, 

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



Rissa tridactyla. KITTIWAKE. 



Larus tridactylus, Linnaeus, S. N. i. p. 224 (1766) . 



Larus tridactylus, Naum. x. p. 322; Hewitson, p. 493; 



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



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. 



Tridactyla = TpiaKTV\os, three-toed ; from rpeTs + dctKTvXos. 



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. 



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

 liri = a Tern. 



Larus glaucus. GLAUCOUS GULL. 



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



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

 p. 504; Gray, p. 230; Yarr. ed. 2, iii. p. 595; id. 

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

 Dresser, viii. p. 433. 



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



Glaucus = -yXavicos, bluish-grey. 



A winter visitant, sometimes in considerable numbers, 

 especially to the northern portions of the United Kingdom, 



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



. Norse 



t/ 



