140 
MESODONTA. 
under Oxyana lupina. The ectociineiform is plane above, and concave 
antero-posteriorly below. It has the usual flat quadrate form, and the inner 
side is concave. Its axis diverges upward from the long axis of the cuboid. 
The mesocuneiform was not found, but the entocuneiform has the form 
already ascribed to that of the StypolopJius Mans. Its inner face displays 
facets for the navicular and mesocuneiform, and the superior extremity is 
narrowed by an oblique truncation from behind. The distal facet is slightly 
concave in the long (i. e., antero-posterior) direction, and is truncate with an 
obliquity outward in the transverse direction. It does not display the 
convex articular face for the metatarsus of the hallux seen in the Quadru- 
mana, so that, although the great toe may have diverged somewhat from the 
others, it was not probably prehensile. 
The anterior linib of the same animal is represented by a few fragments. 
The olecranon is shallow, and wide and flat below, but not so much so as 
in the skeleton No. 2. A strong crest rises from its extremity to the middle 
of the inner side, ceasing below the posterior coronoid process. The head 
of the radius is a wide transverse oval; the neck is but little curved, and the 
biceps insertion is strongly marked. The distal end of the radius is like 
that of No. 2, subtriangular in outline, with a small acuminate tuberosity 
at the external angle. The external portion of the distal condyles of the 
humerus is a portion of a cylinder. 
Measxirements of No. 4. 
Depth of the olecranon... 
Length of the same. 
Transverse diameter of the head of the radius .. 
Vertical diameter of the same.. „... 
Vertical diameter of the distal end of the same. 
Transverse diameter of the same.. 
Diameter of the head of the femur... 
Length of the calcauenm... 
Width of the calcaneum at the astragalar facets. 
Depth of the cuboid facet of the calcaneum. 
Depth of the astragalus externally. . . 
Depth of the distal facet of the astragalus. 
Width of the same.. . . 
Width of the trochlea of the astragalus.. 
Length of the cuboid. - . 
M. 
0.012 
0.020 
0.0135 
0.0085 
0.0135 
0.0085 
0. 0155 
0. 035 
0. 018 
0. 0085 
0. 0085 
0. 00C5 
0. 0115 
0. 0100 
0.0135 
