135

113

Fig. 4. Proximal ends of the three metatarsal bones not united together at this part.
5. Side view of the tarso-metatarsal bone of the Dinornis struthoides.
6. Side view of the tarso-metatarsal bone of the Dinornis didiformis.
7. A transverse section of ditto, at the part corresponding with the three separate
metatarsals of the young Dinornis giganteus, fig. 4.

PLATE XXIX.

Internal structure of certain bones.

Fig. 1. Section of the femur of Dinornis didiformis, natural size : h, an accidental de-
pression at the back of the cervix, not leading into the interior medullary
cavity ; i, the depression in the popliteal space, without any opening into
the interior of the bone.
2. Section of the femur of an Ostrich, half the natural size : h, the orifice and
oblique canal conducting into the interior pneumatic cavity of the bone ;
i, the outlet of the same cavity in the popliteal space.
3. section of the femur of the Apteryx, in which no air is admitted into the me-
dullary cavity ; natural size.
4. Section of the tibia of the apteryx, natural.
5. Section of the tarso-metatarsal bone of Dinornis didiformis, natural size :
h. the obliterated line of union of the tarsal epiphysis.

PLATE XXX.

Restoration of the Dinornis giganteus, and scale of altitude of that and other species,
according to the standard of the Cassowary.

Fig. 1. The three principal bones - femur, tibia, and tarso-metatarsus - of the hind
extremity of Dinornis didiformis.
2. Skeleton of Casuarius galeatus (Pander & D'Alton).
3. The femur, tibia and tarso-metatarsus of Dinornis struthoides.
4. The femur, tibia and tarso-metatarsus of the Dinornis ingens.
5. The pelvis, femur, tibia, tarso-metatarsus, and restored outline of the Dino-
nis giganteus.