1873.] CAROTID ARTERIES OF BIROS. 467 



STEGANOPODES. 

 Both carotids are present in these birds. 

 Species examined. 

 Fregata aquilus. Phalacrocorax carbo. 



Sula bassana. Pha'ethon, sp. 



HERODIONES. 

 Ardeid^e. 

 Both carotids are present in the following species : — 

 Ardea cinerea. Ardea egretta. 



goliath. garzetia. 



purpurea. candidissima. 



alba. Nycticorax europceus. 



But the two carotids join at the lower part of the neck directly they 

 meet in 



Botaurus stellaris. 



Ciconiid-e. 

 Both carotids are present in these birds. 

 Species examined. 



Ciconia nigra. Leptoptilus crumeniferus. 



alba. 



Plataleid^e. 

 Both carotids are present in these birds. 

 Species examined. 

 Ibis rubra. Ibis nippnn. 



melanocephala. Platalea leucorodia. 



strictipennis. 



Phoznicopterid^e. 

 The right carotid is much larger than the left, which joins it low 



down in the neck. 

 Phcenicopterus antiquorum. Phcenicopterus ruber. 



ANSERES. 



Both carotids are present in all these birds. 

 Species examined. 

 Anser segetum. Tadorna rutila. 



Bernicla canadensis. Aix galericulata. 



Chlo'ephaga, sp. Mareca penelope. 



Cygnus niyricollis. Dafila spinicauda. 



buccinator. Querquedula crecca. 



coscoroba. Metopiana peposaca. 



Dendrocygna autumnalis. Fuligula cristata 



viduata. Mergus castor 



fulva. albellus. 



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