298 A HANDBOOK OF EUROPEAN BIRDS. 
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Order TUBINARES. 
Family PROCELLARIIDA. 
Genus PROCELLARIA. 
STORMY PETREL. 
Procellaria pelagica Lznz. 
Adult : Plumage generally sooty-black, paler beneath, rump 
white; a band across the wing whitish; bases of under tail- 
coverts and sides of crissum white; bill, legs and feet black ; 
irides brown. Length 5:5 inches; culmen o0'5; wing 4°6; 
tall.2°2: tarsus Oo: 
Young: Similar to adults, but show less white on the 
wings and at sides of crissum. 
Distribution : Inhabits the North Atlantic, breeding upon 
its eastern shores, also in the Mediterranean, also frequents 
the Norwegian coast and occurs in winter throughout the South 
Atlantic. 
Habitat : Strictly oceanic. 
LEACH’S OR FORK-TAILED PETREL. 
Procellaria leucorrhoa Vzez//. 
Adult : Plumage generally sooty-brown ; upper tail-coverts 
and some of under ones white; ¢az/ deeply forked; smaller 
wing-coverts and some of secondaries brownish-grey; bill, legs 
and feet black; irides brown. Length 7°25 to 7°5 inches ; 
culmen 0°65; wing 6; tail 3°43; tarsus 0°95. 
Young: Probably closely resemble adults. 
Distribution : Breeds on St. Kilda and the outer Hebrides. 
