— 12 — 



392 

 393 



394 



395 

 396 

 397 



398 

 399 



400 



GAVIA *melanocephala, Bp. ex Naît, 



GAVIA *ridibunda, Bp. ex L. 



*a. eapistrata, Temm. 



Xemo eapistrata, Boie. 



CHROICOCEPHALUS bonapartii, Eyton. 



Lavas minutas, Sabine. 

 I. capistratus, Bp. 

 I. bonapartii, Sw. 

 Xema bonapartii, Bp. 



HYDROCOLjEUS minutus, Kaup, ex Pall. 



L nigrotis, Less. 



XEMA sabimi, Leach. 



Laruscollaris, Sabine 



SYLOCHELIDON *caspia, Brehm, ex l'ail. 



St. megarhyncha, Meyer. 

 Hydroprogne caspica. Kaup. 



HALIPLANA fuliginosa, Wagl.ex Gni. 



GELOCHELIDON anglica, Brehm, ex Mont, 

 *a. meridionalis, Brehm. 



aranea,Sa\\, nec Wils. 



THALASSEUS *cantiacus, Boie. 



SI. boysii, Lattï. 

 St. canescens, Mey 



401 



402 



403 



STERNA 



paramsea, Brunn. 



dougalli, Montag. 



404 



STERNA 



HIRUNDO, L. 



arctica, Temm. — macroura. Nauui 



405 



STERNA 



*fluviatilis, Naum. necGotild 



St. hirundo, Temm, 



406? 



STERNA 



nitzschi, Kaup. 



407 



408 

 409 

 410 



411 



THALASSEUS "affinis, Bp. ex Bupp. 



St média, Horsi*. — arabica. Ehrenb. 



THALASSEDS? velox, Bp. ex Bupp. 



STERNULA 



brachytarsa, Graba. 



*minuta, Boie, ex L. 



St. parva, Penn. — metopoleuca, Uni. 



HYDROCHELIDON 'fissipes, Boie, ex L. 



nigraeX'nœvia, Br.—nigra, Temm 



HYDROCHELIDON *nigra, Bp. ex L. 



nœvia, L.jun. — leucoptera, Temm 



HYDROCHELIDON hybrida, Bp. ex Pall. 



leitcopareia, Natter. 



ANOUS stolidus, Leach, ex L. 



Gavia fusca, Br. 

 A7WUS niger, Steph. 



T11IBUS III. URlXATOttES. 



412 

 413 



414 



415 

 416? 



417 



418 

 419 



PINGUINUS impennis, Bonn, ex L. 



Alea major, Br. 



ALCA *TORBA, L. 



pica, L. 



minor, Br. — unisulcata, Brunn. 



MORMON arctica, Ht. ex L. 



fratercula, Temm. 



MORMON glacialis, Leach. 



MORMON CORMCULATA, Kittl. 



glacialis, Audub. 



URIA TROILE, L. 



lomvia, Brunn. 



a. minor, Gm. 

 URIA rhingvia, Brunn. 



lacrymans, La Pylaie 



URIA arra, Pall. 



traite? Brunn. 



brunnichi. Sabine— francsii, Leach 







420? 







421 







422 







423 







424 







425 







426 







427 







428 







429 







430 



URIA unicolor, Benicken. 



CEPHUS grylle, Bp. ex L. 



columba, Pall. 



Uria groenlandiea, Gr 



CEPHUS mandth, Bp. ex Licht. 



MERGULUS allé, Bp. ex L. 



melanoleucus, Ray.— Uria minor, Kr 



COLYMBUS 

 COLYMBUS 



GLACIALIS, L. 

 ARCTICHS, L. 



a. minor, Bp. 



batthicus, Uornsch. 



COLYMBUS *SEPTENTRIONALIS, L. 



PODICEPS 'cristatus, Lath. ex L. 



!" DICEPS LONGIROSTR1S, Bp. 



i vDICEPS holbolli, Beinh. 



P. rubricollis, Audubon 



PODICEPS 'subcristatus, Jacquin. 



P. rubricollis, Lath. 



