Plate IV. 



Fig. 1 Herring Gull, Larus argentatus. Brunnich. 



„ 2. Laughing Gull, Chroicocephalus atricilla. Linnaeus. 



,, 3. Kittiwake Gull, Jiissa tridaclyla. Bonaparte. 



„ 4. Wilson's Tern, Sterna Wilsonii^ Bonaparte. 



,, 5- Least Tern, Sterna frenata. Gambel. 



