July, 1914 
OX THE OOLOGY OF THE PYGOPODES 
171 
I'ig. 50. Xos. 1 AND 2, EGGS OF THE WESTERN Grebe [Aechmophorits occidentalis)', 
NOS. 3 AND 4, EGGS OF THE HoLBOELL Grebe (Colyfubiis holboelH); ale nat- 
ural SIZE. 
