m) 
Cope.] 278 [Dec. 17, 
LIODON CRASSARTUS, Cope, sp. nov. 
Liodon large species near L. proriger, Cope, Proc. Am. Philos. Soc., 
1871, p. 168. 
This saurian, which is similar in size to the last, is represented by a 
series of dorsal lumbar and caudal vertebree with some bones of the 
limbs, 
The vertebree are as much distinguished for their shortness, as those of 
L. latispinus are for their elongation. The articular faces are but little 
broader than deep, and their axes are slightly oblique. They are very 
slightly truncate above by the neural canal., The inferior face is some- 
what concave in the longitudinal direction. The zygapophyses are stout 
and there are no distinct rudiments of zygospen. 
The dorsal vertebre best preserved are those in which the diapophyses 
reach the middle of the sides of the centra, and have no horizontal limb. 
They are narrow and have not extensive articular extremital surfaces. 
The lumbars and anterior caudals have round articular surfaces. One of 
the latter with strong diapophyses but posterior, is sub-pentagonal in out- 
line of cup. The humerus is a remarkable bone having the outline of 
that of Clidastes propython, Cope, but is very much stouter, the antero- 
posterior dimensions of the proximal extremity being greatly enlarged. 
The long diameters of the two extremities are in fact nearly at right 
angles, instead of in the same plane ; and the outline of the proximal is 
subtriangular, one of the angles being prolonged into a strong deltoid 
erest on the outer face of the bone, which extends half its length. The 
inner or posterior distal angle is much produced, while the distal ex- 
tremity is a flat slightly curved diamond-shaped surface. The fibula is 
as broad as long and three-quarters of a disc. The phalanges are stout, 
thick and depressed, thus differing much from those of Liodon iectericus. 
A bone which I cannot assign any other position than that of femur 
has a peculiar form. Itisastout bone, but more slender than the humerus. 
The shaft is contracted and subtrilateral in section. The extremities are 
flattened, expanded in directions transverse to each other, the proximal 
having, however, a lesser expansion, in the plane of the distal end. The 
former has, therefore, the form of an equilateral spherical triangle, the 
apex enclosing a lateral fossa, and representing probably the great tro- 
chanter. The distal extremity is a transverse and convex oval. 
This bone is either ulna, femur, or tibia, judging by form alone. Its 
‘er length as compared with the fibula, forbids its reference to the 
\ the trochanter-like process of the head is exceedingly unlike any 
examples of the second bone I have seen. Its reference to femur is con- 
firmed by its presence with the caudal-vertebre of a similar species from 
near the Missouri River, Nebraska, and its resemblance to the femur of 
The dyspelor. 
M. 
Length HtHMOLUS TY Corre er Anite eH tinn ye sabes 55s tae OR 
Proximal diameter do...... Ce ee eit eet Ae ae 095 
Distal i (Oy ach vig ae natirnd #4 oc Tis wads po aa 0 Gee 102 
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