9 
edge of this, and convexity of the outer facets are received into a trans- 
verse groove of the posterior part of the lower face of the astragalus. 
The cuboid facet is diaggnal and is bounded within by a third narrow 
facet for the astragalus. The astragalus has a strongly convex deeply 
grooved trochlea; the convexity extends over 158°. The trochlea is 
nearly in the vertical, a little oblique to the longitudinal axis of the foot. 
The exterior malleolar facet is well marked and bounds a lateral fossa 
above. The neck of the astragalus is broad and not contracted, but not 
wider than the trochlea. Its navicular facet is wide and concave, the 
cuboid narrow, with a long angle behind. The cuboid is quite elongate 
and with a narrow anterior face ; it has a large posterior tuberosity not 
projecting much posteriorly. The navicular is flat with a sigmoid prox- 
imal face, convex on the inner side, concave on the outer. It has the 
three cuneiform facets below, the inner antero-posterior. The inner is a 
flat bone with antero-posterior plane, and apex directed backwards, and 
considerable oblique facet for the second metatarsal. The mesocuneiform 
is much the smaller and brings the third metatarsus a short distance 
proximal to the fourth. The ectocuneiform is a little wider than deep. 
The metatarsals are three, and are rather slender. The two outer are 
equal in length, and the median but little wider proximally, the increased 
width being more obvious distally. They have no proximal grooves, and 
the outer has a low outer tuberosity. The facets of the second row of 
tarsals are + 44. The phalanges, including ungueal, are 3, 3, 3. The 
proximal ones are longer than wide and contracted at the ends; the 
penultimate are still stouter in form. The ungues of the middle line are 
symmetrical and broad, with the margin a segment of an ovoid, and slight 
contraction at the neck. The proximal articulation is bounded by a fossa 
on each side, which is in its turn, isolated by the elongate process found 
jn the tapir and in the horse. The margin is marked by radiating strize 
separated by grooves, of which the median is the most marked. The 
lateral ungues are contracted on the inner side, and only possess the 
proximal fossa and hook on the outer side. The median distal groove is 
well marked. 
Measurements. M. 
Length of hind foot from heel............--....--.00- 0.286 
os GaleCameUM ss ssaas ds eeeseses we eed an eee wars .083 
ee cuboid facet of do. shag Rtaeere 8 PRaES H stmeas -024 
Depth caleaneum behind...........-..----------20--- 025 
Width a atiastragalus sos 6 cacaa ss ease wemeses 035 
Greatest axiallength of  ( ..seseeee cece cece eeeee 045 
Width between trochlear crests do. .......-.....005 022 
Length neck do. outer side................ eee eee -014 
Width, head “dO: .oscccsccscncansemceadets penwoncs .030 
se MAVICUIAT Ss saga bis sheiew aang Meee NW aa ependese 031 
Length at middle, Gide dwedlas roa wiwescihas -010 
$6 GUDOIC, » ccd decaieess see awe eR Sees ass bseeeess 022 
Depth HE” VOUPSIEE 5.6 o5.2.5 saber sn Secigtalonm ae Be: 025 
