Eggs of Guillemots, Razorbill, and Black Guillemot, shewing comparative sizes. 



T. H. Nelson. 



1. Typical egg of Common Guillemot. 2. Typical egg of Ringed Guillemot. 



3. Typical egg of Razorbill. 

 Egg of Black Guillemot taken at Flamborough. From the collection of the late Charles Waterton. 



See page 726. 



