The three cervicals that succeed the axis show progressively sinking neural spines, which subside in the six following vertebræ (Pl. III.). The third cervical has also the hypapophysis (Pl. XI. fig. 3, _hy_). In all the other cervicals of the present series the hypapophysis is wanting, but each parapophysis developes a plate (Pl. V. figs. 10 & 11, Pl. VIII. fig. 1, _p_) to form the sides of the hæmal canal through which the carotids ran; and the position of such vertebræ in the cervical series is indicated, respectively, by the degree of convergence of these processes, in none of which, where entire, have they met so as to circumscribe the canal: in some of these vertebræ, however, they are mutilated. They differ chiefly in the position and shape of the anapophyses (fig. 10, _a_), which advance from above the postzygapophyses (_z′_), converging towards the middle of the upper surface of the neural arch, being arrested, save in one instance, at the sides of the ligamentous surface occupying the common position of the base of the neural spine. In the axis vertebra (Pl. V. figs. 12 & 13) the posterior articular surface, concave vertically, and 3 lines in that extent at its middle part, is very convex transversely, being continued upon the sides of the posterior part of the centrum; a thick obtuse hypapophysis (fig. 13, _hy_) descends below this surface: the anterior or odontoid surface presents the usual form in birds; the odontoid process (ib. _x_) has a pit at its apex. The prezygapophyses (fig. 12, _z_), of very small size, project from the outer and fore border of the neural arch, with their articular surface looking outward and slightly upward; a ridge is continued from their back part to the base of the postzygapophyses: the surface (fig. 13, _z′_) in these, 4½ lines in long diameter, is three times the size of the anterior one; it is concave transversely, and looks downward and a little outward. The anapophyses (ib. fig. 12, _a_) are large tubercles rising above the articular surfaces. The base of the neural spine, 9 lines in length (ib. _ns_), is coextensive with the neural arch; the spine rises posteriorly to a height of 6 lines, with a thickness of 2 lines, having a convex upper margin (Pl. III.). The relative size and position of the cervical vertebræ, as coadjusted in the position and degree of flexure of the neck represented in Sir Hans Sloane’s life-size painting of the Dodo, in the British Museum, are given in Plate III. with the varying proportions of the pleurapophyses and other processes. _Ribs._ (Plates III. & IV.)