Cope.] 280 [Dec. 17, 
furnish characters confirmatory of those already given as above. The 
vertebre are remarkable examples of flattening under pressure, without 
fracture, some of them having a vertical diameter no greater than one’s 
hand. The cervicals are less flattened and give the impression that they 
were not transversely elliptic. This is consistent with our knowledge of 
the perfect specimen, where it is as described, furnished with vertically 
ovate articular surfaces. In this the cup is symmetrical and not distorted, 
but the ball is a little compressed by pressure, 
The most important addition to the knowledge of this species, furnished 
by the Butte Creek specimen, is the character of the quadrate bone. 
The external longitudinal angular ridge is very prominent and extends 
to the distal end. It supports a hook-like prolongation of the proximal 
articular surface, almost as large a one as in Clidastes propython and more 
narrowed. The ridge is so prominent as to create a wider face or surface, 
behind the basis of the great ala than exists between the latter and the 
edge of the articular meatus. This basis is quite convex outward and 
embraces a relatively smaller space than in other Pythonomorpha. A 
section of the bone at the meatus is subtrilateral with a notch behind. 
The distal articular surface is prolonged below the origin of the great ala, 
and receives the keeled termination of the external ridge. 
M. 
Total length quadrate.........5.e eee eee eee eee eee ee 0.153 
Length from superior to inferior origin of great ala........ 08 
Length external angle from bases of ala............ egret 052 
The two usual ridges pass inward and downwards from the meatal 
knob. 
The above quadrates are flattened from within outwardly by pressure. 
A portion of the palatine bone, supporting these teeth, displays the 
characters of the type, viz.: the inner face vertical and deeper than the 
outer, and forming a strong parapet of bone on the superior or toothless 
aspect. The outer face a little expanded laterally : the bases of the teeth 
exposed. 
It is proper to add, that the locality ascribed to the type specimen 
‘“‘near Fort Hays, Kansas,’’? which was given me on inquiry, is probably 
erroneous, Fort Wallace being the point intended. 
LiopON DyYSPELOR, Cope. 
Proced. Amer. Philos, Soc., 1870, 574; 1871, 168, 172. 
This large reptile was first described from specimens sent to the Smith- 
sonian Institution from New Mexico. Professor Mudge subsequently ob- 
tained it in Kansas, and on my late expedition I had the good fortune to 
procure a large portion of another, on a sloping bluff on Butte Creek, 
fourteen miles south of Fort Wallace. This specimen is one of the most 
instructive which has yet bean discovered, including as it does fifty verte- 
bre from all parts of the column, a large part of the cranium with teeth 
and both quadrate bones; the scapular arch complete, except lack of 
coracoid on one side, both humeri, radius and numerous phalanges of 
a 
