164 THE DISTRIBUTION OF 
breeding-places which they show the commonest is the 
pointed egg, which does not roll off the rocks readily, 
while the eggs themselves are frequently protectively 
Fic. 43. Kittiwake Gulls nesting on basaltic pinnacles on May, Island, * 
in the Firth of Forth. (Photo by Mr. George West.) 
coloured, except where, like those of the puffin, they 
are concealed in holes. 
Of the reptiles relatively few are marine animals, 
the habit being most frequent among the turtles and 
