

259 
three or more species of Dinornis, and probably included all the parts of that rare 
bone which had been obtained in this collection from the swamp at Glenmark. 
One of the fragments (no, 1), ineluding the left anterior angle wanting the costal 
process, affords the means of comparing the anterior and costal borders with the 
sternum of Dinornis rheides. The costal border shows a proportion of extent from 
without inward double that in D. rheides; it is of a more definite triangular form, with 
the base forming the inner or upper border of the tract, and the apex obtuse; it is 
traversed by two obligue continuous ridges for the attachment of the sternal ribs, the 
second of nearly equal extent with the first, which is not divided as in D. rheides and 
the Ostrich, The anterior border is bent upward or inward like that in D, rheides, but 
terminates in a much thicker margin than in D. rheides; the convex bend inclines 
towards the costal border, is not so abruptly continued into it as in D. rheides: there is 
no definite pneumatic depression; the pneumatic foramina extend over a greater pro- 
portion of the fore part of the upper or inner concavity. The whole bone, so far as 
preserved in this fragment, is thicker than the corresponding part of D. rheides, and 
may well, therefore, have formed part of the sternum of the more robust species of 
Dinornis to which it is ascribed by Dr. Haast. 
A second corresponding fragment of a sternum (no. 2), in which the costal process is 
preserved, has a costal border resembling in shape that in D. rheides; but both articular 
surfaces are undivided, the lower one being more extensive and broader than in D, rheides, 
not projecting as a ridge. The depression between the surfaces is much less extensive 
and less deep than in D. rheides; the costal process is broader but thinner, directed 
more outwardly than in D. rheides, from which it shows the more important difference 
of a deeper and much better-defined coracoid depression, of which the anterior boun- 
dary is partially produced as a ridge, and the posterior or upper one is plainly defined. 
The articular surface, broadest externally, is concave from before backward, slightly 
convex transversely, but with a small special depression at the narrower median end; 
there is also a pneumatic hole near the front ridge. The costal process has an obtuse, 
convex termination. The pneumatic depression on the anterior inner surface of the 
sternal body is more definite than in D. erassus, but is wider and less deep than in 
D. rheides. This portion of sternum shows characters specifically distinct from those 
in the two species named, 
A third fragment of sternum in the lot, no. 16, includes the costal process and border 
of the right side of that bone. ‘The process is entire, of a different shape from that in 
either D. rheides or D. crassus, the anterior margin being obliquely truncate toward 
the narrower but obtuse apex. There is a well-marked distinction from no. 1 in the 
absence of any defined coracoid depression; and sufficient of the body of the bone is 
preserved to show the absence of a pneumatic depression, such as exists in D. rhewdes, 
The external convexity leading to the anterior border is less abruptly defined than in 
D. rheides. The two articular tracts on the costal border are narrow, oblique, and 
