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II. On Drvornis (Part XIII.): containing a Description of the Sternum in Dinornis 
elephantopus and D. rheides, with Notes on that Bone in D. crassus and D. casua- 
rinus. By Professor Owsn, F.R.S., F.Z.S., Le. 
Read June 25th, 1868. 
[Puates VII. to IX.] 
IN November 1867 I was favoured by a note from Henry Sumpter, Esq., requesting 
me to inspect a collection of bones which he had received from a correspondent at 
Christchurch, Canterbury Settlement, in the South (or Middle) Island of New Zealand, 
and which were to be seen at Mr. Sumpter’s place of business at No. 1 Church Court, 
St. Clement’s Lane, Lombard Street, whither I forthwith proceeded. 
It appeared that the bones had been obtained from the extensive swamp or bog at 
Glenmark, about forty miles from Christchurch ; they consisted of a considerable pro- 
portion of the skeleton of the Dinornis elephantopus, of a less complete series of the 
bones of D. rheides, including bones of the foot, corresponding with those figured in 
pl. 8, Vol. IV.! There were also a few bones of D.crassus. In this collection I saw, for 
the first time, specimens of sterna, entire, of the large wingless birds of New Zealand. 
Sternum of Dinornis elephantopus, Ow. (Plate VII.) 
The collection of bones of Dinornis elephantopus includes a sternum (Pl. VII.), 
wanting only the margin of the anterior border with the costal processes: the costal 
tracts (d, c, c, fig. 2, m,n, 0) are nearly entire; and a great part of the lateral processes 
(fig. 1, hh) are preserved, showing that these diverged from the sternal body at a more 
open angle than was given in the restoration of the bone from the fragments accom- 
panying the skeleton figured in pl. 47, Vol. IV. of these ‘ Transactions,’ such restoration 
being guided by the analogy of the more perfect sternums referable to the genus 
Dinornis (pl. 43, Vol. III.) or Palapterya (pl. 4, Vol. IV.). 
In the transverse extent and straightness of the anterior border (fig. 1,4), the small 
and feebly marked coraeoid depressions limited to the outer angles of that border (dd), 
and in the pair of wide and deep posterior vacuities (ff), this sternum exhibits the 
general Dinornithic modifications of the type of the bone presented by the Apteryz, 
and noted at p. 163, Vol. IV. 
The body of the sternum in Dinornis elephantopus is unusually flattened ; the upper or 
1 Described in Memoir, Part iv. (Feb. 1850), in Vol. IV. of these Transactions, pp. 8-20. 
VOL. VII.—PART I. Jan. 1870. R 
