of the United States. 
309 
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. Procellaria 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 . hr it. 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. 
Puffinus, Briss. Cuv. JBoie. Brehm. JVectris, Forsi. 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 ; 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 
