The _ulna_ (Pls. III. & VIII. figs. 16 & 17) is 3 inches 1 line in length, of the usual ornithic character, with a well-defined, narrow, elliptic, rough muscular depression, 8 lines in length (fig. 16, _c_), extending upon the shaft from below the anterior or palmar angle of the proximal articular surface. This bone has no pneumatic foramen; the orifice for the medullary artery is above the middle of the same palmar surface, the canal inclining distad. The shaft of the bone is nearly straight; the back or anconal surface, which is slightly convex, shows feeble impressions of the attaching ligaments of the alar plumes, which are represented in all the figures of the entire or living bird. A second ulna is 3 inches 3 lines in length. There was no carpal or pinion bone in the collection of remains submitted to me: this part of the wing is conjecturally restored in dotted outline in Plate XV. _Bones of the Leg._ (Pls. III., IX., X. & XI.) Of the five _femora_ in the above defined series of remains of the Dodo, two measure 6 inches 3 lines in length; one (Pl. IX.) is 6 inches 4½ lines; the shortest is a little under 6 inches, with proportionate differences in the diameter of the shaft. All of them show a small pneumatic foramen (Pl. IX. figs. 1 & 2, _p_) on the inner side of the anterior ridge of the great trochanter (ib. _c_), and on the same transverse line with the head of the bone. This part shows an oblong depression (ib. figs. 2 & 3, _a_) for the “ligamentum teres” at the upper and back part. The articular surface on the same aspect of the neck (ib. fig. 3, _b_), adapted to the trochanterian prominence of the pelvis (Pl. VII. _t_), is well-defined. The trochanter (Pl. IX. fig. 1, _c_) rises, ridge-like, above the level of the head, and is continued from behind the middle of the articular surface on the neck, forward, with a convex outline upon the fore and outer part of the shaft, where it gradually subsides; a narrow intermuscular ridge (ib. fig. 1, _r_), inclining to the middle of the fore part of the shaft, is continued from the trochanterian one. The small trochanter (ib. fig. 3, _d_) is a small subcircular tuberosity, in some specimens a ridge, 3 to 4 lines in length, on the inner side of the shaft, about an inch below the head. The muscular impressions on the fore part of the bone are well defined. A minute medullary canal (ib. fig. 3, _m_) perforates the middle of the back part of the shaft; the popliteal fossa (ib. fig. 3, _o_) shows a few small pneumatic orifices; a triangular rough flat surface divides the fossa from the outer condyle. Above the fibular depression (ib. fig. 3, _g_) there is a well-defined, slightly raised, rough surface (ib. _k_) for the head of the ectogastrocnemius muscle. The ridge (ib. _n_) extending to the back part of the inner condyle is not sharp; the rotular groove (ib. fig. 1, _p_) is deep and moderately wide, with the inner boundary, formed by the narrow anterior part of