10 



The Wilson Bulletin — No. 66. 



were undisturbed. At our approach, even when many yards 

 distant, they spilled off the sides of the rocks like a cataract. 



In figure 1) one bird may be seen about to assume the incu- 

 bating posture. The egg is resting upon the ends of the toes. 

 The bird will straighten up, fluff the feathers of the underparts 



Carroll Islet. 



Figure 8 



California Murre (Uria troile calif ornica). 

 Birds at three feet. 



out, then settle down with the egg completely hidden beneath 

 the feathers and its ends resting securely upon the bird's feet. 

 If the bird is so much startled that it takes wing suddenly the 

 egg is set to rolling and may roll off from the rock into the 

 ocean. 



In figure 8 one bird may be seen with its mouth stretched 

 wide open and the bill pointing straight up. The bird is utter- 

 ing a curious call, to which none of the other birds give the 

 least attention. The call seems to be a purely personal matter, 

 and may be variously interpreted. 



