Synopsis of Orders and Families. 



HERRING CULL. 



COMMON TERN, 



Family S- GULLS AND TERNS. Larid^. 



Toes usually four, three front ones webbed; upper ma'ndible curved and hooked; tail 

 usually square ("Gulls, subfamily Urhiw). Bill straight and pointed; tail often forked 

 ("Terns, subfamily Sternince). 



BLACK SKIMMER. 

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