THE ALLOSAURUS GROUP 5 
when alive, or had feasted upon the carcass. When the Allosaurus jaw 
was compared with these score marks it was found to fit them exactly, 
the spacing of the scratches being the same as the spacing of the teeth. 
Moreover, on taking out the Brontosaurus vertebrie from the quarry a 
number of broken-off teeth of Allosaurus were found lying beside them. 
As no other remains of Ailosaurus or any other animal were intermingled 
with the Brontosaurus skeleton, the most obvious expianation was that 
these teeth were broken off by an Allosaurus while devouring the Bronto- 
saurus carcass. Many of the bones of other herbivorous dinosaurs 
found in the Bone-Cabin Quarry were similarly scored and bitten off, 
and the teeth of Allosaurus were also found close to them. 
With these data at hand the original idea was conceived of com- 
bining these two skeletons, both from the same formation and found 
within a few miles of each other, to represent what must have actually 
happened to them in the remote Jurassic period, and mount the Allo- 
saurus skeleton standing over the remains of a Brontosaurus in the 
attitude of feeding upon its carcass. Some modifications were made in 
the position to suit the exigencies of an open mount, and to accommodate 
the pose to the particular action; the head of the animal was lifted a 
little, one hind foot planted upon the carcass, while the other, resting 
upon the ground, bears most of the weight. ‘The fore-feet, used in 
these animals only for fighting or for tearing their prey, not for support, 
are given characteristic attitudes, and the whole pose represents the 
Allosaurus devouring the carcass and raising head and fore-foot in a 
threatening manner as though to drive away intruders. The balance 
of the various parts was carefully studied and adjusted under direction 
of the curator. The preparation and mounting of the specimen were 
done by Mr. Adam Hermann, head preparator, and his assistants, 
especially Messrs. Falkenback and Lang. 
As now exhibited in the Dinosaur Hail, this group gives to the 
imaginative observer a most vivid picture of a characteristic scene of 
that bygone age, millions of years ago, when reptiles were the lords of 
creation, when ‘‘ Nature, red in tooth and claw” had lost none of her 
primitive savagery, and the era of brute force and ferocity showed little 
sign of the gradual amelioration, which was to come to pass in future 
ages through the predominance of superior intelligence. 
W. D. Martruew. 
