Plate XVI 



^:^ 



Fig, 

 Herring Gu]iC_^;;.<T^,-= . » ,= 

 (Larus argentatu!^) ■ ^--^^r' 



Fig. 2. Common Gull (Larm canus) 



Fig. 4. 



Black-headed Gull 



(Larus ridibuiidua). 



Fig. 6. Little Tern (Sterna minuta) 



Fig. 7. Sandwich fern (Sterna cantiara.). 



Fig. 8. Common Tern 

 (Sterna jlm^iatilis). 



