The eight left vertebral ribs (Pl. III.) and the five right ones do not, either of them, constitute a consecutive series, but have come from different individuals, of different sizes, as exemplified in the third rib figured in Plates III. and IV. The sternal ribs (P. IV. figs. 3 & 12) are characterized by the two facets, nearly or quite meeting at an open angle, into which their sternal end expands (ib. fig. 3, _c_). One of these ribs, which is entire, shows the single, elliptic syndesmotic surface at the opposite end (ib. _b_); it is 3½ inches in length, with a greatest breadth of 5 lines, and is straight. Another and longer specimen (ib. 12) shows a moderate degree of curvature. A third specimen is 6 inches in length: the proximal end has a breadth of nearly half an inch (the penultimate rib in Pl. III.). Five successive sternal ribs are indicated by gradational size and curvature, and a sixth, which does not reach the sternum. Before describing this bone I shall proceed with the account of the sacral vertebræ, and the expanded hæmal arches of such as complete the pelvis. _Pelvis._ (Plates III. & VII.) The pelvis of the Dodo is chiefly remarkable for the flatness and great breadth of the posterior half, corresponding with the characteristic proportions of that part of the body in Pl. I. fig. 2, and in the old woodcuts of the Dutch “Dodaersen”[25]. It includes sixteen coalesced sacral vertebræ, with which the iliac bones are continuously confluent.