Plate 51 



*-"■*•■.■; 



8 • •'? " 







Black Tein. 



I 



Black Tern 



Caspian Tern.. 







\ 





i. 



V 



Xod<K-. 



* it* 



< mil- hilled Tern. 





• 



•4 



• if 



7»» 



Smaller Sootv Tern. 



1 ki. •»» ' »^ 

 i . *» i A 



(mil-hilled Tern, 



iWson&Brailsfora.Lith Sheffield 



