558 PROCEEDINGS OF THE NATIONAL MUSEUM voi,. m 



Species studied 



By Glenny 



Pelecanus erythrorhynchos Gmelin \ Pelecanus occidentalis carolinensisGmelin 



Family Sulidae 



Carotids B-4-s {Sula spp.) and A-1 (Morus bassanus); type 1 

 thoracic arter}^ (Sula spp.) and type 2 or type 3 thoracic artery 

 (Morus bassanus) ; Hgamentiim botalli lacking. 



Species studied 



By Garrod 

 Sula bassaiia — Morus bassanus (Linn6) 



By Glenny 

 Morus bassanus (Linn6) 



Sula sula sula (Linn6) 



Sula dactylatra personata Gould 



Sula leucogaster etesiaca Thayer and 



Bangs 

 Sula leucogaster plotus (Forster) 



Family Phalacrocoracidae 



Carotids A-1; ligamentum botalli lacking; vertebrals and super- 

 ficial cervicals usually have separate points of origin from the common 

 carotid arteries. 



Species studied 

 By Glenny 

 Phalacrocorax auritus floridanus 



(Audubon) 

 Phalacrocorax pelagicus pelagicus Pallas 



Phalacrocorax urile (Gmelin) 

 Phalacrocorax verrucosus (Cabanis) 



By Garrod 

 Phalacrocorax carbo (Linn6) 



Family Anhingidae 

 Carotids B-4-s ; ligamentum botalli is reduced to a linea botalli. 



Species studied 



By Glenny 



Anhinga anhinga (Linne) 



Family Fregatidae 



Carotids A-1 and B-4-s; ligamentum botalli absent. 

 Garrod (1873) reported the bicarotid condition in Fregata aquila, 

 whUe I found the laevocarotid condition in Fregata minor palmerstoni. 



Species studied 



By Garrod 

 Fregata aquila Linn6 



By Glenny 

 Fregata minor palmerstoni (Gmelin) 



Order CICONIIFORMES 



The arrangement of the dorsal carotids is highly variable, but 

 basically bicarotid (see list of species studied) ; type A coracoid artery; 



