11 
The dentary teeth are well shown in Plate II, figure 3, and very little 
need be said about them here. The dental magazine is moderately shallow 
and usually there are but two teeth, in the vertical series, below the func- 
tional ones. The greatest depth of magazine from the foramina, at the 
base of the tooth row, to the cutting edge, is 77 mm. and it is much deeper 
anteriorly than posteriorly. There are 36 rows of teeth in the magazine, 
which measures 240 mm. The enamel face of the teeth is slightly broader, 
relatively, than in most members of the Lambeosaurinae. Papillae are 
present on all the teeth but are more pronounced on the anterior ones. The 
anterior teeth are somewhat sigmoid in shape. This irregular shape may 
not be constant within the species, but it is shown in both dentaries. The 
triturating surface is composed of one enamel crown and two fangs except 
at the extremities. 
SKELETON 
The greater part of the skeleton in front of the sacrum was preserved, 
except the left fore limb and the phalanges of the hind feet. These bones 
have been only partly prepared, but certain information pertaining to the 
limbs and the integument is available. Measurements of the fore and 
hind limbs will be found in the comparative measurements of different 
species. The articulated series of 28 presacral vertebrae gives a length 
of 6 feet 2 inches. This does not include the first two cervicals, so there 
were at least 30 presacrals in the complete column. There were ossified 
tendons in the rock near the skull, which would suggest that they may have 
extended farther forward than is usually supposed. 
The scapula is relatively very short and of light construction. The 
upper edge is straight, but below it flares out as it proceeds backward, thus 
making a fairly wide blade; postero-inferiorly it cuts off so as to give a 
broadly rounded corner. This is quite unlike the square termination 
usually seen in the hadrosaurian scapulae. 
The humerus is of moderate size, but the radial crest is very strongly 
developed and extends well below the mid-length of the bone. 
The radius and ulna are moderately slender and much longer than the 
humerus. 
The manus is of moderate size. 
EPIDERMIS 
A section of splendidly preserved skin impression from the upper side 
of the forearm is shown in Plate V, figure 2. The tubercles w r ere of the 
usual polygonal non-imbricating type, but there is a greater variation in 
size than has been previously shown. It would appear that the large 
pavement scales covered the forearm much as Osborn shows in Thespesim 
(Trachodon) annectens (12, Figure 10), but the tubercles are much larger. 
The largest scales have a diameter of 18 mm., whereas the smallest ones 
measure less than 4 mm. in greatest extent. 
Smaller pieces of well-defined skin impression from near the hind 
limbs show rather large scales without differentiated pattern. These 
tubercles were moderately high and show radial crinkling. Other bits of 
the impression from the neck show proportionately high but very small 
tubercles. 
