* 
Cope. ] 268 [Dec. 17, 
vertebra, especially the anterior, and in various details of structure of 
the quadrate bones, as well as the larger number of teeth. 
Discovered in Fossil Spring cafion in the grey limestone by Martin Hart- 
well and Sergeant Wm. Gardner. But one specimen was found, which 
includes the greater part of the cranium, with the vertebre as far as the 
lumbar region. 
EDESTOSAURUS STENOPS, Cope, sp. nov. 
Indicated by a large part of the skeleton of one individual, and frag- 
ments of two others. The first includes a large part of the cranium, with 
both quadrates, and fifty vertebra, including the axis. The characters 
are similar to those of the preceding species, but all the bones are more 
massive, though of the same dimensions. 
The teeth are strongly compressed, with cutting edge fore and aft, and 
with the surfaces distinctly faceted ; there are seventeen on the mandi- 
ble. The palatine bones are stouter than in Z#. tortor, but the teeth are 
not larger, and are probably as numerous, as they are similarly spaced. 
The vertebra exhibit round articular surfaces, those of the dorsal region 
being rather stouter than the cervical, though the difference does not ap- 
pear to be so marked as in the preceding species. The anterior caudals 
possess wide diapophyses. The articular faces are a vertical oval, a little 
contracted above, sometimes by a straight outline. They preserve a 
peculiarly elongate form. 
The quadrates, like those of the last species, have a very prominent ex~ 
ternalangle. They present various differences which may be regarded 
as individual ; for example, the edge of the great ala isnot expanded out- 
wards, but only inwards; the distal articular extremity is wider, the 
posteriorly decurved hook is more contracted, forming a deeper external 
concavity behind the external angle. Characters of more importance are 
the lack of the two ridges which bound the posterior face of the distal 
end of the bone, that face being thus convex instead of concave, and the 
process below the meatus is isolated and not continued into a ridge, ex~ 
cept internally, when it gives rise to the heavy ridge which extends to the 
base of the great ala. The button on the posterior aspect of the hook is 
wanting, its place being taken by a recurvature of the smooth articular 
face along the margin. 
Length of axis (above)........... cece sees ee eens 
eee at 
Length of a posterior dorsal........ 
Diameter bell { Transvetie \-. 20. sssscsscisaslieones 
Length caudal with flat diapophysis.................. 033 
DSM CUDy dO) Ga eva re oh ans OEE S os 03 
WHC CU nee GO at AE Montes BOR AE Ns 03 
Length mandible (28 inches). .....00- 616s cesses eee 720 
Depth at coronoid process..... OR iiss Tener eenr es 150 
bees @ puomiay CHOP OL CENtaLy.: tess se. mes te es O74 
a0. 288 Sai stal Us OU ia oP .02 
