662. LARUS OCCIDBNTALIS, Ato. 



^I^esterii CrUlI. 



663. LARUS CALIFORNICUS, Lawb. 



California Gull. 



664. LARTTS DELA"WARBNSIS, Ord. 



Rln^-bllled Cull. 

 664a. LARUS BRACHYRHYNCHUS, Rich. 

 Short-billed Gull. 



665. LARUS SUCKLBYI, Lawr. 



Suckley'8 Gull. 



666. BLASIPUS HBBRMANNI, Bonap. 



ITIilte-lieaded Gull. 



667. CHROICOCBPHALUS ATRICILLA, Lisn. 



liau^hin^ Gull. 



668. CHROICOCBPHALUS FRANKLINII, Bkti. 



Franklin's Rosy Gull. 



669. CHROICOCBPHALUS CUCULLATUS, Br. 



Hooded Gull. 



670. CHROICOCBPHALUS PHILADBLPHIA, 



Bonaparte's Gull. 



671. CHROICOCBPHALUS MINUTUS, Bruch. 



Liittle Gull. 



672. RISSA TRIDACTYLA, Bonap. 



Klttlwake Gull. 



673. RISSA SBPTENTRIONALIS, Lawe. 



IVortta Pacific Hittiwake. 



674. RISSA BREVIROSTRIS, Brandt. 



Sbort-billed KIttiwake. 



675. RISSA NIVBA, Bruch. 

 Tellow-blUed Gull. 



676. PAGOPHILA BBURNBA, Kaup. 



Ivory Gull. 



677. PAGOPHILA BRACHYTARSI, Holb. 



Sbort-Ic^ged Gull. 



678. RHODOSTBTHIA ROSBA, Jard. 



ITedge-talled Gull. 



679. CRBAGRUS FURCATUS, Bonap. 



SwalloiT-talled Gull. 



680. XBMA SABISm, Bonap. 



Fork-tailed Gull. 



681. 



682. 



683. 



685. 



687. 



689. 



690. 



691. 



692. 



693. 



694. 



695. 



696. 



697. 



698. 



699. 



700. 



STERNA ARANBA. WiLS. 



Marsb Tern. 

 STBRNA CASPIA, Palias. 



Caspian Tern. 

 STBRNA RBGIA, Gambel. 



Royal Tern. 

 STBRNA BLBGANS, Gambel. 



Elegant Tern. 

 STBRNA ACUFLAVIDA, Cabot. 



Cabot's Tern. 

 STBRNA HAVBLLI, Aud. 



Haven's Tern. 

 STBRNA TRUDBAUn, Aud. 



Trudeau's Tern. 

 STBRNA FULIGINOSA, Gm. 



Sooty Tern. 

 STBRNA ■WILSONI, Bonap. 



Wilson's Tern. 

 STBRNA MACROURA, Naum. 



Arctic Tern. 

 STBRNA FORSTBRI, Nutt. 



Forster's Tern. 

 STBRNA PARADISBA, Bbunn 



Roseate Tern. 

 STBRNA PIKBI, Lawr. 

 Slender-billed Tern. 

 STERNA FRENATA, Gambel. 



lieast Tern. 

 HYDROCHBLIDON PLUMBBA, Wils 



Staort-tailed Tern. 

 ANOUS STOLIDUS, Leach. 



Noddy Tern. 

 RHYNCHOPS NIGRA, Linn. 



Black Skimmer. i, 



COLYMBUS TORQUATUS, Bbunn. 



liOon. 

 COLYMBUS ARCTICUS, Linn. 



Black-throated Diver. 



COLYMBUS PACIFICUS, Lawr. 



Pacific Diver. 



18 



