THE CAROTID ARTERIES OF BIRDS. 175 
GRALLA. ; 
‘Both carotids are present in these birds. 
Species examined. 
CHARADRIIDZ. Totanus calidris. 
Vanellus cristatus. _ —— solitarius. 
Charadrius pluvialis. Gambetta flavipes. 
— hiaticula. Machetes pugnaz. 
Hematopus niger. Scolopaz rusticula. 
Strepsilas interpres. Gallinago scolopacina. 
—— gallinula. 
ScoLopacip2. Tringa canutus. 
Numenius arquatus. cinclus. 
—— pheopus. Glareola, sp. 
Timosa lapponica. 
GAVL&. 
Both carotids are present in all these birds. 
Species examined. 
s LaRiDz. : 
Lestris antarcticus. Larus glaucus. 
Larus argentatus. Sterna hirundo. 
PROCELLARIIDZ. Page 470. 
Both carotids are present in all these birds. 
Species examined. 
Thalassidroma pelagica. 4strelata lessont. 
— fregata. Prion vitatta. 
—— bulweri. 
PYGOPODES. 
Both carotids are present in the following species :— 
CoLYMBID2. ALcID2. 
Colymbus glacialis. Alea torda. 
Uria troile. 
The left carotid only is present in the following species :-— 
CoLyMBiD2. ALcIDe. 
Podiceps cristatus. . ; Arctica alle. 
—— minor. 
