168 Transactions. — Zoology. 



physial faces look more dorsi-ventrad than in Dinornis, and 

 they are not so broad. In the middle cervicals — 11 to 14 — the 

 centra are very short, and the post-axial surface very broad ; 

 the width at the ventral margin more than one and a half 

 times that of the dorsal margin, the height less than one-half 

 the ventral breadth. No pneumatic foramen on Nos. 7 to 10. 

 Hypapophyses rise immediately behind the pre-axial border 

 of the centrum in Nos. 13 and 14, and nearly so in the 

 anterior vertebras. Neural ridges very short, and nearly 

 parallel, steep-sided in the anterior vertebras, but getting quite 

 flat in the posterior ones ; the transverse bar well developed 

 in all. An inter-zygapophysial bridge in 11 and 12. A 

 shallow saucer-shaped hollow at the pre-axial base of the 

 neural ridge. Faces of the post-zygapophyses nearly hori- 

 zontal (as in Meionomis). Posterior cervicals, 15 to 21 : 

 Centra short ; pneumatic foramina in all. A deep valley in 

 front of the hypapophyses in No. 17. Neural ridges high, but 

 short, in No. 15 ; a pit on their inner sides in Nos. 16 to 18. 

 Hyperapophyses distinct in No. 18. 



Thoracic Vertebra. 



Post-axial faces of the centra moderate, narrowest in 

 No. 25. In No. 22 the ventral breadth is considerably more 

 than the height ; in No. 24, also, the ventral margin is greater 

 than the dorsal ; but in the others the sides are parallel, and 

 the height is about equal to the breadth. The anterior 

 pneumatic foramen is situated entirely above the rib-facet ; it 

 is well developed in Nos. 28-25, small in Nos. 24 and 23, and 

 absent in No. 22. The posterior pneumatic foramen is small 

 or absent in Nos. 28-23, but well developed in No. 22. The 

 hypapophysis in No. 22 is a compressed central nodule ; in 

 No. 23 it extends over the anterior half only of the centrum ; 

 in 24 it is continuous along the whole of the centrum ; in 

 25 it is divided in the centre into two parts : there is an 

 anterior nodule on 26, but not on 27. The transverse pro- 

 cesses are rather short ; the neural spine in No. 22 is much 

 inclined forwards (in all the others they are broken off). The 

 post-zygapophyses are inclined to each other at about a right 

 angle ; the valley between them is shallow. The pre-zygapo- 

 physes are shorter than in any other genus, and they are 

 but slightly expanded distally. 



Sternum. 

 Eesembles that figured by Sir E. Owen in Trans. Zool. 

 Soc, vol. vii., pi. 7, and Ext. Birds of N.Z., p. 72. The body 

 is broad and flat, with strong lateral processes, which diverge 

 much from the central line. Median process short. Anterior 

 border slightly curved ; the costal processes well developed. 



