19 
from this end it measures 190 mm. It is 100 mm. broad at its narrowest 
point near the centre of the shaft. 
The fibula is more massive than in Corythosaurus but resembles that 
of Hypacrosaunts, 
OSSIFIED TENDONS 
Ossified tendons lie along the neural spines of practically all articulated 
skeletons of hadrosaurs that have been reported, but the writer is not 
aware of such ossifications having been reported from other parts of the 
skeleton. In the present specimen there is a well-developed series of ossi- 
fied tendons running down the front of the femur, from the overhanging 
process of the ilium to the distal end of the femur and others at right 
angles to the distal end of the bone. An attempt has been made to show 
these in the drawing (Plate VI), but it is difficult to show them all as some 
lie beneath others. Some rock fell during the collection of the specimen 
and dislodged certain of the tendons so that some are left incomplete. The 
drawing shows only those that are actually connected. 
One tendon reaches the apex of the overhanging process of the ilium 
and three end somewhat short of this point. Others, which are covered 
by the rock and skin impression, may have reached equally high. One 
reaches to above the ilium just ahead of the process and one runs at right 
angles to these from near the great trochanter to above the ilium. Three 
rather large tendons lie close to the femur and ahead of these is a bundle 
of six slightly smaller ones. Only those on the surface are shown in the 
drawing. In cross-section they vary from flat to oval and the terminal 
ends are bluntly pointed. Three tendons lie beyond the distal end of the 
femur at about right angles to the. others. 
Several ossified tendons are seen in the rock containing the base of the 
tail and others may be enclosed beneath the skin impression. These do not 
seem to follow a definite course, though all run diagonally back and down 
across the vertebrae and one extends to the base of the tail near the first 
chevron. Nothing can be stated regarding the tendons along the neural 
spine, for these are covered by rock and skin impression or, as in the 
dorsal region, were destroyed by erosion before the specimen was dis- 
covered. 
SKIN IMPBESSION 
In those sections that have been prepared the skin impression has been 
left undisturbed where it was preserved over the skeleton. In the pelvic 
region blocks of the sandstone, with skin impression, were removed and in 
other places tunnels were made beneath the impression to show the arch 
bones. The posterior ribs and that portion in front of the right femur up 
to -the top of the ilium are covered by skin impression. This shows the 
usual type of small tubercles without differentiation of size or pattern and 
no limpet-like bosses are seen in any of the integument preserved. The 
integument seems to have covered the tendons and the femur, without sign 
of folding, to near its distal end. This would suggest that the femoral 
part of the limb was not free, but rather that it was largely enclosed within 
the flank. 
The first 4 feet of the base of the tail has been partly prepared. It 
is covered by skin impression which has not been disturbed. There is some 
