are much more distinct than on others, sometimes forming a zone round 

 the larger end of the egg, and sometimes scattered promiscuously over the 

 entire surface. These marks are sometimes in the form of blotches, at other 

 times they are fine scratchy streaks. When they are freshly laid, very fine 

 specimens are rather like poorly marked Kittiwake's eggs, but the locality of 

 the nest is sufficient identification. They vary in length from 2*58 to 2'o 

 inches, and in breadth from 175 to r62 inch. Incubation lasts from twenty-six 

 to twenty -nine days, and both birds take their share in the duties of 

 hatching the egg. 



Young in down are uniform blackish brown, the bill, legs, and feet being 

 the same colour. 



VOL. II. 2 B 



93 



