of the United States. 369 



or in holes in the earth, where they also retire during bad 

 weather; lay but one very large egg. Feed their young by 

 regurgitating into their bill their half digested and oily ma- 

 rine food. Defend their offspring boldly, and blind their 

 enemies by spurting in their face an oily, acrimonious liquor. 

 Voice hoarse, stridulous, singular when subterranean. 



Found in all latitudes. Formed of but few species, one 

 only in our hemisphere. Allied to the larger Gulls. 



310. Procei.laria glacialis, L. White ; back and wings 

 bluish-gray ; tail cuneiform ; bill and feet yellow. 



Summer plumage, a blackish spot before the eye. 



Young pale-cinereous, varied with brown ; bill and feet 

 yellowish-gray. 



Fulmar Petrel, Lath. Penn. brit. zool. p. 145. t. M.fig. 1. 



Petrel de VIsle de St. Kilda, Buff. pi. enl. 59. 



Inhabits in great numbers the Arctic seas ; very rare and 

 accidental on the temperate coasts of North America and 

 Europe. 



69. PUFFINUS. 



Pujjinus, Briss. Cuv. Boie. Brehm. Nectris, Forst. Petrel- 

 Puffin, Temm. Procellaria, L. Gm. Lath. 111. Temm. 

 Vieill. Ranz. 



Bill longer than the head, slender, robust, hard, much com- 

 pressed at the point ; both mandibles much curved and acute 

 at tip ; upper seamed each side, turgid at the point j lower 

 somewhat shorter, angular beneath, with the end very distinct: 

 nostrils basal, opening in two tubes, approximated and dor- 

 sal : tongue moderate, entire, conic. Head small, narrowed 

 behind ; eyes very large : body compressed. Feet mode- 

 rate, stout, large ; naked space of the tibia extensive ; tarsus 

 equal to the middle toe ; toes long ; middle one subequal to 

 the outer ; inner shortest ; the lateral margined exteriorly 



