PROFESSOR OWEN ON THE GENUS CNEMIORNIS. 397 



spine (ns), the base of which is less than half the length of the neural arch; on each 

 side the spine, at some distance from it, there is a vacuity (o) in the neural platform. 

 This vertebra, from the analogy of the cervical region in the skeleton of Dinornis and 

 Casuarius, has come from the anterior part of the neck, and was probably the third or 

 fourth of the series. 



A cervical vertebra (PI. LXIV. figs. .5 & 6), from the lower or hinder third of the 

 neck, shows a haemal canal {h) beneath the fore part of the centrum (fig. 1, c'), formed 

 by the parapophyses {p,p) ; the hypapophysis has disappeared from the back part of 

 the centrum (c"). The thick and short pleurapophysis (pi) shows three longitudinal, 

 shallow, wide grooves ; the diapophysis {d) forms a thick, obtuse, sub-bitid projection, 

 external to and below the prezygopophysis (z), from the back part of which extends a 

 slender bar of bone (6) to the side of the centrum, unequally dividing the hinder outlet 

 of the vertebrarterial canal (v). The interzygapophysial plates are here wanting, as is 

 also the neural spine, its place being occupied by a chevron-shaped, rough tuberosity it), 

 as in the vertebrae of the bend of the neck, which is concave neural. 



In a cervical vertebra, contiguous or near to the preceding, the posterior aperture of 

 the vertebrarterial canal (v) is more equally divided by a horizontal bar of bone. 



Other cervicals do not present characters worthy of special notice. 



Dorsal Vertebr<s. 



The bodies of the dorsal vertebrae (PI. LXIV. figs. 3 & 4) have the usual terminal 

 concavo-convex articulations, the concavity being transverse on the anterior surface (c') ; 

 the last is compressed, the sides converging below to a ridge, representing a hypapo- 

 physis. The neural spine {ns) is 1 inch 6 lines in height, 10 lines in fore-and-aft 

 diameter, moderately thick, with a truncate, subexpanded, transversely convex summit ; 

 the diapophyses {d) are strong, trihedral, being supported by a trihedral buttress 

 (tig. 4, b). In the antecedent dorsals, of which seven are preserved — probably the entire 

 number — the lower part of the centrum is produced into a compressed hypapophysis 

 (fig. 3, ky) ; the articular surface for the head of the rib is an oval depression, near the 

 front margin of the centrum, supported upon a slightly produced parapophysis {p) ; 

 the terminal subconcave surface on the diapophysis [d), by its distance from the para- 

 pophysis, gives the length of the neck of the rib, and enables one to identify, as belong- 

 ing to Cnemiornis, some of the ribs in the promiscuous lot of bones raised out of the 

 fissure at Timaru. 



Pelvis. 



The pelvis (PI. LXIV. figs. 5, 6,7) includes seventeen sacral vertebrae with the coalesced 



ossa innominata ; from which, however, the pubic and ischial bones have been broken 



off. The bodies of the sacral vertebrae diminish in breadth to the third (fig. 6, c), where 



the sides converge to a ridged inferior termination ; they then expand to the seventh, 



