[ 3h ] 



Genus LXXXIX. GULL. 



N' 



I. 



Great G. 



N° ii. 



Brown-headed G 



2. 



Black-backed G. 



12. 



Laughing G. 



3- 



Herring G. 



u- 



Winter G. 



4- 



Glaucous G. 



14- 



Skua G. 



5- 



Silvery G. 



»5- 



Black-toed G. 



6. 



Wagel G. 



16. 



Arftic G.. 



7- 



Ivory G. 



i7- 



Little G. 



«. 



Common G. 



i8. 



Tarrock G. 



9- 



Black-headed G. 





Var. A. 



:,b. 



Red-legged G* 

 Var. A. 



19. 



Kittiwake G, 



ILL ftrong, ftrait, but bending down at the point ; on the 

 under part of the lower mandible an angular prominence. 



Noftrils oblong and narrow, placed in the middle of the bill. 



Tongue a little cloven. 



Body light : wings long. 



Legs fmall, naked above the knees : back toe fmall. 



Between the Gulls and Terns there feems much affinity, and by 

 fome authors they have been confidered as one family ; but they 

 are perfectly diftinguifhable, and eafiiy feparated into two genera. 

 The Gulls are in general ftouter proportioned birds than the 

 Terns, and have the bill much ftronger, and crooked at the end, 

 fome of them in a degree equal to many birds of prey ; while that 

 of the Tern is for the mod part ftrait and (lender. The legs are 



Vol. III. 3 B likewife 



