In comparing the femur of the Dodo with that of the largest Dove, the bone appears gigantic. The length of the femur in _Goura coronata_ (Pl. XII. fig. 11) is but 3 inches 3 lines, and it is more slender in proportion to its length than in the Dodo; it, however, repeats the few characteristics, if they may be so termed, of the Dodo’s femur. It has the pneumatic foramen in the same position, perhaps proportionally larger; it has the same large oblong surface for the ligament at the head of the bone; the great trochanter has the same form and disposition, but is not quite so much produced anteriorly; there is a slight depression instead of a ridge for the trochanter minor; the fore part of the inner condyle is relatively thicker and less produced. The femur in _Otis_ and _Œdicnemus_ has a thicker and shorter trochanter major, & more narrow and shallow rotular channel; it is shorter in comparison with the tibia, and more especially with the metatarsus, than in _Didus_ and the Doves. The femur of _Aptornis otidiformis_[37] is of the same size as that of the Dodo; but it has no pneumatic foramen, the head is more hemispheroid and inclined forward, the ligamentous pit is deeper and more circular, the supracervical articular surface is not defined from that of the head, there is a wider and deeper depression at the fore part of the proximal end of the femur, and a more prominent tuberosity on the back part; the ridge continued from the back part of the shaft to that of the inner condyle is more produced and sharper in _Aptornis_, the fore part of the same condyle is less produced. The femur in _Cnemiornis_[38] and _Dinornis_[39] is much thicker, in proportion to its length, than in either _Aptornis_ or _Didus_. In _Pezophaps_ the great trochanterian ridge rises higher above the neck, and the shaft has a more uniform thickness, with the inner contour less concave, than in _Didus_. The characters which have been noted at the proximal and distal ends of the tibia of _Didus_ are repeated in those of the tibia of the _Goura_. The difference in size is more marked than in the femur; the length of the tibia of _Goura coronata_ is 4 inches 7 lines, and its shaft is more slender, in proportion to its length (Pl. XII. fig. 13), than in _Didus_ (Pl. X.). The tendency to a trihedral form of the shaft is less marked in _Goura_; the anterior prominences of the distal condyles are thicker in proportion to the intervening fossa. In the Vulture the fibular ridge is more parallel with the long axis of the shaft than in _Didus_; the tendinal canal is less cylindrical, has an oblique course from the middle of the anterior surface towards the inner condyle; the fore parts of both distal condyles are less produced and less convex; the distal end is narrower from before backwards in proportion to its breadth; both extremities of the bone are less expanded in proportion to the shaft than in the Dodo.