-stouter, but less strong 
270 [Dee. 17, 
Cope.) 
cludes the greater part of the cranium and seventeen vertebra, with ribs, 
Isolated portions of other individuals were also found in the same region 
of country. 
The disproportion between the diameters of the cervical and dorsal 
vertebre ig more marked here than the species of Hdestosawrus. The 
te, though with larger diameter. The cranium 
ra are less elong 
ively much smaller, the teeth absolutely smaller, though the quad- 
5 are of equal size. The general character of the species is 
rate 
‘ly armed, and less elegantly built. 
The hypapophysis of the atlas has a short small keel below. The 
1 spine of the azis is elongate, but less so than in the two Hdesto- 
saurt, truncate behind, with a median groove into which the anterior keel 
of the neural spine of the third cervical vertebra is applied. The dia- 
ting surface, and is 
pophysis of this vertebrae has a short vertical articula 
ug 
continued into a longitudinal keel, which disappears before reaching the 
edge of the cup. The same process of the a 
ritudinal paral- 
lelogrammic articular surface. 
The swupraoccipital is very thick and is roof-shaped, the keel rising 
nearly perpendicularly from the foramen magnum. 
The suspensoria are directed both upwards and backwards, at about an 
che squam- 
angle of 45° in each direction, and support on their extremitic 
a 
osal bones. These are prolonged, forming part of their appropriate arch. 
Tho occipital condyle is transversely oval. The sphenoid bone embraces 
as usual the basi-occipital protuberances ; it is not earinate on the 
median line below. It sends out on each side near the anterior extremity 
a sub-horizontal laminar process. 
The quadrate bone is much like that of H. ictericus, but is relatively 
smaller. While the teeth in that species are smaller, the quadrate is 
larger, hence the difference in the species is in this point quite striking. 
The external angle is prominent but very obtuse, and is the summit of a 
yery thick obtuse ridge which extends to near the distal articular surface. 
The posterior hook is much prolonged downwards and has no button-like 
process or extension of the articular surface on its posterior face. This 
face presents a strong rib along the meatus and disappearing above the 
pit, throws the latter into a depression. This isinereased by the swelling 
of the external angular rib. A prominent knob very rugose at the ex- 
tremity rises beneath the end of the hook, and bounds a concavity be- 
tween it and the external rib. 
The latter closes the concavity by curving round towards the knob above 
mentioned. A keel rises exterior to the rib, and below it, and continues 
into the external angle of the articular extremity. Another very promi- 
nent keel extends from the knob beneath the hook to the base of the great 
ala. The articular extremity is transverse, and in one plane. 
The maatilary bone, is marked with shallow longitudinal grooves. It 
supports eleven teeth and has a rather steep premaxillary suture descend- 
ing in front. The nareal expansion in front occurs opposite the fourth 
tooth, 
eae ati 
