The neural arch circumscribes a canal the anterior outlet of which (ib. fig. 1, _n_) is oval with the small end downward, 5 lines in vertical, and 3½ in transverse diameter: the sides of the neural canal slightly project inward above the lower third: the posterior outlet (Pl. V. fig. 4, _n_) is more regularly elliptical in form, and rather narrower in proportion to its vertical diameter. The neurapophysis sends off from the outer and fore part of its base a stout process, which expands and divides into zygapophyses (Pl. IV. fig. 1, _z_) and diapophyses (ib. _d_); the articular surface of the former is of a full oval shape, flat, looking obliquely upward and inward; the diapophyses extend outward and a little backward: the articular surface for the tubercle of the rib is transversely elliptical and nearly flat. The hinder part of the neurapophysis expands into the postzygapophyses: these have coalesced with the præzygapophyses in the succeeding vertebra (Pl. V. fig. 2, _z_), as has happened also between this and the third vertebra. In the last of the three vertebræ the postzygapophyses are entire (ib. _z_ 3), and show very slightly concave, oval articular surfaces, looking obliquely downward and outward (ib. fig. 4, _z_). The conjugational foramina, continuously surrounded by bone, are a full ellipse, and large, the anterior one (ib. figs. 1 & 5, _f_) being 5½ lines in vertical diameter; the second (ib. _f′_) is somewhat less: these foramina are also rather larger in one of the specimens than in the other. The length of the three coalesced dorsals is the same in both, viz. 2 inches 3 lines. The neural spines have run together into a continuous ridge in fig. 1, _ns_; in fig. 5 the summit is broken off in both, leaving only the anterior angle of the foremost entire; in both this inclines forward; the hinder border of the third vertebra (fig. 1, _ns_) has the same vertical parallel as the back part of the centrum. The anterior margin of the base of the spine shows a rough surface for the attachment of ligament (Pl. IV. fig. 1, _ns_). A small foramen behind the base of each of the coalesced zygapophyses (Pl. V. fig. 2, _z_ _z_) leads to a canal descending to the neural one, and indicates superiorly the limits of the otherwise continuously ossified neural arches.