Hutton. — The Axial Skeleton in the Dinornithida. 169 



No coracoid depressions ; but distinct pneumatic depressions 

 inside. 



The pelvis is too fragmentary for description. 



Section B. Type — P. elephantopus, Owen. 



Cervical Vertebra. 



The cervical vertebra differ from the last in the post-axial 

 surfaces of the centra being narrower, and the neural ridges 

 considerably longer, and the bar between them rising very 

 obliquely. The thoracic vertebra, from No. 28 to No. 24, 

 have well-developed posterior pneumatic foramina. The trans- 

 verse processes are longer ; as also are the pre-zygapophyses, 

 with a deep channel between them. 



This type is much more common than the first, and is 

 represented in Sir E. Owen's drawings, Trans. Zool. Soc, 

 vol. x., pp. 152-170, and Ext. Birds of N.Z., pp. 396-414. 



Pelvis. 

 The pelvis is very broad, and the centre of the acetabulum 

 is in the centre of the ilium. The pre-acetabular portion of 

 the ilium is low, and the two meet dorsallv in a rounded 

 ridge, which is straight in an axial direction. They do not 

 project in front of the neural spine of No. 28 vertebra. 

 They begin to diverge before the anterior margins of the 

 acetabula, and then form a broad pelvic disc, the angle of 

 divergence being about 70°. The posterior portion of the 

 ilium is very broad and flat, and does not project beyond 

 vertebra 45 or 46. The lateral surface is perpendicular and 

 very shallow, not projecting as a ridge below the vertebral 

 column. The ventral surfaces of the sacral vertebrae are 

 narrowed ; the transverse processes of the posterior vertebrae 

 are strong and not very oblique, those of Nos. 38 and 44 being 

 at right angles to the axis. 



Sternum. 

 Same as in Section A. 



Genus EURYAPTERYX, Haast (1874). 

 Emeus, Lydekker (1891). 

 Type — E. gravis, Owen. 



Cervical Vertebrae. 



The atlas has the neural canal transversely oval, the hori- 

 zontal diameter rather more tban one and a half times the 

 vertical. The pre-axial articulating surface is crescentic, the 

 margins, if continued, forming a circle. Post-zygapophyses 

 distinct, projecting post-axially, and carrying distinct rounded 



