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ORDER ANSERES. 
GENUS XLI. 
LARUS, GULL. 
This genus is distinguished by the fol- 
lowing characters : 
Beak straight, sharp -edged, a little 
hooked at the tip, and without teeth ; 
lower mandible gibbous below the point. 
Nostrils linear, broader on the fore- 
part, and placed in the middle of the beak. 
Linnaeus makes two divisions in this ge- 
nus ; those without a cere, and those whose 
nostrils are covered with a cere. 
Temminck arranges the Arctic Gull, 
Skua Gull, and Pomarine Gull in a sepa- 
rate genus, which he has denominated 
Lestris. He gives the following as the 
generic characters : 
