739. 
740. 
7Al. 
743. 
745 a. 
756. 
757. 
PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
COLYMBUS PACIFICUS Lawre. 
Pacific Diver. [700.] 
COLYMBUS SEPTENTRIONALIS Linn. 
Red-throated Diver. [701.] 
ALCA IMPENNIS Linn. 
Great Auk. [710.] 
UTAMANTIA TORDA (Linn.) LEeacnu. 
Razor-billed Auk. [711.] 
FRATERCULA ARCTICA (LiINN.) STEPH. 
Common Puffin. [715,716.] 
PRATERCULA ARCTICA GLACIALIS (LEAcH) Ripew. 
Large-billed Puffin. [714.] 
FPRATERCULA CORNICULATA (Navum.) GRAY. 
Horned Puffin. [713.] 
LUNDA CIRRHATA PALt. 
Tufted Puffin. [712.] 
CERATORHINA MONOCERATA (PALL.) Cass. 
Horn-billed Puffin. [717,718.] 
PHALERIS PSITTACULA (PALL.) TEMM. 
Parrot Auk. [725.] 
SIMORHYNCHUS CRISTATELLUS (PALL.) MERREM. 
Crested Auk. [719,720.] 
SIMORHYNCHUS PYGMZUS (GMEL.) Ripew. 
Whiskered Auk. [721.] 
CICERONIA PUSILLA (PALL.) Ripew. 
Least Auk. [722,723.] 
PTYCORHAMPHUS ALEUTICUS (PALL.) BRANDT. 
Cassin’s Auk. [724.] 
ALLE NIGRICANS Linx. 
Sea Dove; Dovekie. [738.] 
SYNTHLIBORHAMPHUS ANTIQUUS (Gm.) CouEs. 
Black-throated Guillemot. [736.] 
SYNTHLIBORHAMPHUS WURMIZUSUME (TEMM.) COUuES. 
Temminck’s Guillemot. [737.] 
BRACHYRAMPHUS MARMORATUS (Gm.) BRANDT. 
Marbled Guillemot. [732,733.] 
BRACHYRHAMPHUS KITTLITZI Branpt. 
Kittlitz’s Guillemot. [735.] 
BRACHYRHAMPHUS HYPOLEUCUS XANTUS. 
Xantus’s Guillemot. 
211 
