270 
Mr. J. H. Gurnev on 
wlietlier it is found in Greenland, but in any case it is tlie 
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 
Fig. 6. 
Outline of the head of Anser erythropus. (The "Wash, England.) 
Fig. 7. 
OutUne 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. erythropus, reaching backwards to a point between the 
