Cope. ] 21 2 [Nov. 17, 
portion of the fibula, the right internal metatarsus somewhat broken, and 
a caudal vertebra. There are other uncharacteristic fragments, and a 
piece which may be a dermal bone. 
Associated with them are several coprolites of large animals. 
These species indicate an animal of about the size of the Hadrosaurus 
foulkei, Leidy, and with a similar disproportion in the lengths of the 
limbs. 
This is readily appreciated on comparison of the huge metatarsus with 
the light humerus. The medullary cavity of the tibia is large; that of 
the humerus small. 
The portion of the humerus preserved is injured, and the condyles are 
worn. Its relation to that of H. foulkei is readily determined, and on 
comparison the following marked differences appear: The ridge connect- 
ing the external condyle with the shaft posteriorly is acute ; it is rounded 
in H. foulkei. External distal face is flat or slightly concave; in H. 
foulkei somewhat rounded. It is at right angles to the plane of the 
anterior face, and forms with it rather less than a right angle; in H. 
foulkei this region is rounded. Distally, the shaft is much flattened in 
H. crassicauda. 
Measurements. Lines. 
Antero-posterior diameter of shaft, just above condyles.... 20.5 
Width external face distally...... MOTO Gh 24, 
fA OLCCLANAY HOSA Vee sG SEE oc. ess SS 1G 
es Condylesy (GstimMaAped yey het Fy Mak Ta 64, 
The anterior face at over three inches above the condyles is slightly con- 
cave. About 4.5 inches above the articular face of the external condyle, 
the acute ridge dividing the posterior and external faces disappears, and 
the surface becomes regularly rounded. 
The portion of the tibia is from the shaft of that of the left side, just 
below the superior antero-posterior expansion. Therefore, the inner face 
is the most extensive, and the posterior the least so. It differs from the 
same part in H. foulkei, in its less angularity, especially in the more 
rounded, and less defined posterior face. 
The internal face narrows downwards, and while the greater diameter 
of the fragment above is antero-posterior, below it is diagonal, the anterior 
point being the inner, 
Measurements. Lines. 
Antero-posterior diameter above. 6.02.20 66%. ewes e cans . 48. 
Transverse ‘¢ St Suis  MeaMegica Ma Maen Rone 22.5 
: 5S MOGUL AT Ys, CAV ADY ie sp sie es cage ote acu 20.5 
The portion of the fibula is the distal, and resembles that of Hadrosau- 
rus foulkei, in being slightly expanded near the extremity, and cylindric 
in the lower part of the shaft. In both genera and Ornithotarsus, Cope, 
the distal extermity of the fibula is less attenuated then in Iguanodon, 
