14 THE BEAVER 
Maddren, of the United States Geological Survey, col- 
lected part of a femur in Yukon Territory, nearly up to the 
Arctic Ocean. 
The finest specimen of the giant beaver ever discovered 
is at Earlham College, Richmond, Indiana. It was found 
in a swamp in Randolph County, Indiana, and was reported 
to have been discovered “standing in the natural position.” 
It was not quite grown. Though some of the bones were 
missing it was more nearly complete than any other speci- 
men. The fore feet were missing, and have never been 
found with other specimens. The specimen was mounted, 
and a cut is presented herewith, copied from Hay. The 
fore feet were modeled after those of the beaver, and other 
missing parts restored from other known specimens. 
The total length, measured along the curve of the back 
as mounted, is seven feet, two inches, about twice the length 
of a good-sized beaver, but the animal probably was not 
quite full-grown. Large specimens very likely reached a 
length of eight or nine feet, more than twice the length of » 
the beaver, ‘“‘and therefore more than eight times the bulk 
of the latter.” (Hay.) A skull from Iowa was fourteen 
inches long (Fig. 6). 
The incisors were enormous. The upper ones formed 
about a semicircle, and in the Earlham specimen were 8.14 
inches long, measured along the outer curve. On this curve 
they project forward and downward beyond the bone al- 
most four inches. The width was 0.93 inches, and the 
thickness from front to back almost as*much. ‘These teeth 
are relatively much larger than in the beaver. 
The lower incisors were much longer than the upper; 
in the Earlham specimen 9.69 inches. 
The enamel was not confined to the front of the incisor, 
as is the case with the beaver, but passed around its whole 
outer face. It was missing on the other faces. The enamel 
