CORYPHODOK 
197 
The second and third are distinguished by the possession of two proximal 
or carpal facets each, while the first, fourth, and fifth have but one each, 
and the first is peculiar in being squarely truncate. The shafts are wide, 
and the distal articulations transverse, excepting a feeble carina on the 
under side. The phalanges are short; all except the first of the pollex wider 
than long. Those of the second place are very narrow, being mere trans¬ 
verse, openly angulate bands. The ungual phalanges are short, and 
expanded transversely by the horizontal production of the lateral distal 
angles. 
The inferior surfaces of the digits are defended by numerous sesamoid 
bones, which are of subcrescentic section. They rest in pairs, one of them 
on each side of the distal extremity of the metacarpals and metatarsals. 
Pelvic arch and hind limb .—The ilium is characterized by the width of 
its peduncle and the expanse of its plates. The crest has the regular con¬ 
vexity and the length seen in Loxolophodon and the Prohoscidia. The 
anterior border is acute, and is convex at the anterior inferior spine. The 
ischium is wide and flattened to the base; its posterior border is convex, 
with superior tuberous surface. The pubis is father narrow. 
The femur has the shaft flattened in the species known to me, and the 
border of the great trochanter is but little reflected backward. In the 
American species, the third trochanter is very small; in the European 
species, figured by Hubert, it is larger. The trochlear patellar surface is 
moderately elevated, one bounding ridge a little more so than the other, but 
the condyles are not compressed, and the intercondylar fossa is of usual 
width. The tibia is not so much shortened as in Loxohphodon, but resem¬ 
bles it in the rudimental spine and low obtuse crest. The shaft becomes 
subcylindric toward the distal extremity, and then expands transversely to 
the astragalar articular face. This is, as already described, of remarkable 
character. It is transverse and flat, without either groove or keel; the 
posterior border is slightly oblique, rising to the outer side. The malleolus 
projects beyond it, and its inner convex face supports a continuation of the 
articular surface, which is applied to a concavity of the inner side of the 
astragalus. As the mechanical result of this arrangement, there was 
no flexion and extension of the foot on the leg; but it is possible that there 
