250 
PANTODONTA. 
Measurements. 
Length of a lumbar centrum.. .. 
• (transverse... 
Diameter of the same { . • , 
( vertical . .. 
Diameter of the neural canal of the same. 
Diameter of the humerus at the tuberosities. 
Diameter of the humerus at the crest. . 
Diameter of the condyles of the humerus { 
Transverse diameter of the acetabulum... 
Transverse diameter of the peduncle of the ilium. 
Transverse diameter of the sacral fossa. 
Transverse diameter of the base of the ischium.. 
Length from the acetabulum to the sacral fossa. 
Diameter of the distal end of the femur | transverse.... 
( antero-posterior. 
Diameter of the shaft interiorly (transverse). 
Length of the fibula.. 
Transverse diameter of the distal facet of the same. 
Transverse diameter of the superior face of the astragalus. 
Antero posterior diameter of the superior face of the astragalus 
Vertical diameter of the external face of the astragalus. 
M. 
0. 045 
0. 068 
0. 040 
0. 024 
0.110 
0. 055 
0. 064 
0. 050 
0. 065 
0. 076 
0. 050 
0.032 
0.115 
0. 088 
0. 079 
0. 048 
0. 230 
0. 038 
0. 054 
0. 040 
0, 016 
This animal was entirely adult. It is marked T in the field-notes. 
METALOPHODON, Cope. 
Proceed. Amer. Philos. Soc., 1872, p. 542 (Sept. 20); Ann. Eeport U. S. Geol. Surv. 
Terrs., 1872, 589 (1873). 
Metalophodon armatus, Cope. 
Keport, loc. cit., p. 543. 
The only portion of a skeleton which I can refer to this genus is a 
fragment of a large superior canine tooth, which is not sufficiently charac¬ 
teristic to enable me to make a final specific determination. The crown is 
much compressed, so as to be lenticular in section near the apex, and the 
anterior and posterior edges are acute. A short distance above the apex on 
the exterior side, another ridge rises into prominence, and continues to near 
the base of the crown. It becomes as prominent as the inner or apical 
ridge, and incloses with it a wide and strongly concave groove. The inner 
face of the crown of the tooth is the widest, the outer the most convex. 
The enamel surface is longitudinally minutely ridged striate, the strim 
turning outward to the cutting-edges. The tusk belonged to a rather larger 
