ALCIDAW—PUFFIN. 305 
naked skin at gape yellow; eyelids orange; irides grey. 
Length 11 to 12 inches; culmen 1°7; height of bill at base 
1'5; wimg 6; tarsus 11. Billof female slightly smaller than 
that of the male. 
Adult (Winter): Bill smaller and less conspicuous in 
colour, the basal sheath having been shed in autumn. 
Young: Differ from adults in having the cheeks much more 
suffused with grey ; lores smoky-grey ; bill about half the depth 
of adults—brownish. 
Distribution: Breeds in suitable localities on the coasts 
of North-western Europe and Eastern North America. 
Habitat : Sea cliffs and rocky islets. 
Note.—On Spitzbergen a larger race distinguished by some under the 
name of /, g/acialis occurs. 
