270 



Mr. J. II. Gunicv on 



whether it is found in Greenland, but in any ease it is the 

 New World representative of the other two forms. 



Since Professor Newton first discriminated between A. 

 albifrons and A. erythropus (P. Z. S. 1860, p. 339) the marks 

 by which the latter has been held to be distinguishable 

 from A. albifrons are its much smaller size, its distinctly 



Fis. 0. 



Outline of the head of Anser eri/t/vo^ms. (The Wash, England.) 



Fiff. 7. 



Outline of the head of Anser erythropus. (The Delta, Egypt.) 



smaller beak, and the slightly darker tint of its plumage, 

 more particularly beneath the wing, though this cannot be 

 said to be apparent in Mr, Coburn's specimen. The white 

 of the face and forehead is generally more extended in 

 A. erythrojms, reaching backwards to a point between the 



