CONTENTS. 
Common Tern, 
Havel l 5 s Tern, - 
Trudeau’s Tern, 
Arctic Tern, 
Roseate Tern, - 
Black Tern, 
Least Tern, 
Noddy Tern, •> 
Rirundo, - 
Havellii, - 
Trudeauii, 
Sterna Jlrctica, - 
Dougallii, 
nigra, 
■minuta, - 
stolida , 
vii 
- 256 
- 262 
- 264 
* 266 
* 271 
* 275 
- 278 
* 282 
