OSTEOLOGY OE THE HYOPOTAMIM. 
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Fig. 4'. Calcaneum of a Perissodactyle ( Anchitherium ). 
i, internal astr. facet ; e, external astrag. facet ; s, sulcus sustentaculi. 
Fig. 5. Two metatarsals of Diplopus, left foot, from the New Forest (Brockenhurst). 
B.M. The phalanges of the third digit are restored. 
Fig. 5'. Section of these two metatarsals in the middle. 
All the figures except the scapula are of the natural size. 
PLATE XXXVI. 
Figs. 2 & 3 are of the natural size, all others two thirds of the natural size. 
Fig. 1, side, and fig. 1', front view of the ulna of Diplopus from Hordwell. B.M. 
or, outer radial facet ; ir , internal radial facet. 
Fig. 2. Front view of the upper part of the ulna of Ilyopotamus, Puy : or, external radial 
facet ; ir, internal radial facet ; cb, connecting bridge. 
Figs. 1" & 2'. Sections of both ulnse : e, external ; i, internal edge ; a, anterior ; p, pos- 
terior surface. 
Fig. 3. Proximal part of radius of Ilyopotamus, Hempstead. B.M. 
Fig. 3'. Distal extremity of the radius of Ilyopotamus from Hempstead. 
ex, external ; i, internal side, B.M. 
Fig. 4. Humerus of Diplopus, from Hordwell. B.M. 
c, intercondylar perforation; a, middle bulging ; b, internal projection. 
Fig. 4'. Section of the same. 
Fig. 5. Femur of Ilyopotamus from Puy. 
t.mj, trochanter major ; t.mn, trochanter minor. 
Fig. 6. Smaller femur from Hempstead. B.M. 
Fig. 7. Tibia and fibula of Diplopus, Hordwell. B.M. 
Fig. 7'. Distal view with the fibula. Fig. 7". Section about the middle of the bone. 
PLATE XXXVII. 
Letters common to all the figures : — s, scaphoid ; l, lunar ; p, pyramidal ; tz , trapezium ; 
t, trapezoid; m, os magnum; u, unciform; c, calcaneum; a, astragalus; ^navi- 
cular ; cb, cuboid ; c 3 , third, c 2 , second, and c x , first cuneiform. 
Fig. 1. Bight fore foot of Hippopotamus', fig. 2 of Anoplotherium tridactylum from 
Vaucluse; fig. 3 of Xiphodon. 
Fig. 4. Side view of the right fore foot of the Hog ; fig. 5 of Dicotyles ; fig. 7 of 
Tragulus Kantchil ; fig. 8 of Hyomosclius aquations. 
Fig. 6. Third right metacarpal of Palceoclmrus (Allier), to show the absence of the radial 
enlargement. 
N* 
MDCCCLXXI1I. 
