Eggs always two in number. 



jVomenclature used in British Oology. Nomenclature to be substituted. 



Mo. of Plate, 



LXXX. Colymbus glacialis 



LXXXIII. ^ arcticus 



septentrionalis 



FAMILY, ALCAD^. 



Eggs one, rarely two, in number. 



L. 



XXXVI. 



LXXV. 





Uria troile 



grille 



Alca torda 



CXLV. 

 XLVII. 



{ 



impennis 



Mergulus melanoleucos 

 Mormon fratercula 



FA MIL Y, P ELECA NIDJE. 



Eggs four or five in number. 



XXXIV. 

 LXXIV. 



Sula Bassana 

 Carbo cormoranus 

 graculus 



FAMILY, LARIDjS. 



Eges two or three in number. 



CXXV. 

 IV. 



cm. 



LXVI. 



XIX. 



XXV. 



XLVIII. 



CII. 



LVII. 



LXXXIX. 



CXLVIII. 



LXXIX. 



XCIX. 



XVII. 



LVI. 



LI. 



Sterna Caspia 



cantiaca 



hirundo 



Dougalii 



arctica 



minuta 



nigra 



Larus ridibundus 



canus 



rissa 



glaucus 



argentatus 



marinus 



fOscus 



Lestris cataractes 

 . Richardsonii 



XXXVII. 

 XXXIX. 



One Egg only. 



Procellaria glacialis 



pelagica 



puffinus 



Thalassidroma pelagica 

 Puffinus anglorum 



