PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM 207 
663. LARUS MARINUS Lixy. 
Great Black-backed Gull. [600.] 
664. LARUS OCCIDENTALIS Aun. 
Western Gull. [662.) 
[665.] LARUS AFPFINIS REInu. 
Siberian Gull. 
666. LARUS ARGENTATUS Britny. 
Herring Gull. 
666a, LARUS ARGENTATUS SMITHSONIANUS Cougs. 
American Herring Gull. [661.] 
667. LARUS CACHINNANS Patt. 
Pallas’s Herring Gull. 
668. LARUS CALIFORNICUS Lawr. 
Californian Gull. [663.] 
669. LARUS DELAWARENSIS Orp. 
Ring-billed Gull. [664.] 
670. LARUS BRACHYRHYNCHUS Ricu. 
Short-billed Gull. [664a, 665, 673.] 
[671.] LARUS CANUS Linn. 
Mew Gull. 
672. LARUS HEERMANNI Cass. 
Heermann’s Gull. [666.] 
673. LARUS ATRICILLA Linn. 
Laughing Gull. [667.] 
674. LARUS FRANELINI Sw. & Ricu. 
Franklin's Gull. [668, 669.] 
675. LARUS PHILADELPHIZ (Orb) Gray. 
Bonaparte’s Gull. [670.] 
676. RHODOSTETHIA ROSEA (MacaiLu.) Bruca. 
Ress’s Gull. [678.] 
677. XEMA SABINEI (J. Sasine) LEACH. 
Sabine’s Gull. [620.] 
678. CREAGRUS FURCATUS (NEB.) Bp. 
Swallow-tailed Gull. [679.] 
679. STERNA ANGLICA Montaa. 
Gull-billed Tern. [681.] 
680. STERNA CASPIA Patt. 
Caspian Tern. [682.] 
681. STERNA REGIA Game. 
Royal Tern. [683.] 
