THE CONDOR 



Vol. XIX 



All eggs are narrowly elliptical in form, one end being slightly smaller. 

 The two photos of nests clearly show the form. I believe the usual complement 

 of eggs is four, while I think three is not unusual. I have never seen any sets 

 of five, but set no. 3 contained six eggs. As far as I have been able to learn 

 this set of six is the largest of which there is any record. The following tables 

 show the dimensions of eggs, in millimeters. 



Set No. 1 

 21.1x13.9 

 20.6x14.2 

 21.1x13.9 

 20.6x14.2 

 Aver. 20.8x14.1 



Set No. 4* 

 21.0x13.0 

 21.2x13.0 

 20.8x13.2 

 20.8x13.2 

 Aver. 20.9x13.1 

 *Measurements 

 (Measurements 



Fig. 3. Arrow points to horizontal crack 

 from which set no. 5 was taken after re- 

 moval of a rock weighing at least 35 tons. 

 This nest was about 115 feet from the 

 top of the cliff. 



Set No. 2 



20.6x13.9 



20.8x13.9 



20.8x13.7 



Aver. 20.7x13. 



Set No. 5t 

 19.1x12.9 

 19.3x13.1 

 19.9x13.3 



Aver. 19.4x13.1 



Set No. 

 21.1x13 

 21.3x13, 

 21.6x13, 

 22.1x13 

 21.3x13 

 21.1x13 

 Aver. 21.4x13 



Set No. 



20.3x13, 



20.8x13, 



20.8x13 



Aver. 20.6x13 



by H. S. Swarth, Museum of Vertebrate Zoology. 



by Chas. H. Rogers, American Museum of Natural History. 



