172 THE CAROTID ARTERIES OF BIRDS. 
Glaucidium, sp. Surnia funerea. 
Pulsatriz torquata. 
- Page 467. STEGANOPODES. 
Both carotids are present in these birds. 
Species examined. 
Fregata aquila. Phalacrocorax carbo. 
Sula bassana. Phaéthon, sp. 
HERODIONES. 
ARDEIDA. 
Both carotids are present in the following species :— 
Ardea cinerea. Ardea egretta. 
—-~ goliath. garzetta. . 
—— purpurea. candidissima. 
alba. Nycticorax ewropeus. 
But the two carotids join at the lower part of the neck directly 
they meet in 
Botaurus stellaris. 
CICONIIDE. 
Both carotids are present in these birds. 
Species examined. 
Ciconia nigra. Leptoptilus crumeniferus. 
alba. 
PLATALEIDZ. 
Both carotids are present in these birds. 
Species examined. 
Ibis rubra. Ibis nippon. 
melanocephala. Platalea leucorodia. 
strictipennis. 
PHENICOPTERIDA. 
The right carotid is much larger than the left, which joins it low down 
in the neck. 
Phenicopterus antiquorum. Pheenicopterus ruber. 
ANSERES. 
Both carotids are present in all these birds. 
Species examined. 
Anser segetum. Bernicla canadensis. 
