PROFESSOR OWEN ON THE GENUS DINORNIS. 243 
which exaggerates the departure from a ‘natural system’ when such ‘ order’ is posed 
as a group equivalent in value to all the rest of the class of birds. 
From the indications of the coracoid notches in the sternum of Dinornis parvus, a 
diminutive pair of scapulo-coracoid bones may have escaped the notice of the finder of 
the present skeleton; they would appear to have been proportionally smaller than the 
subjects of pl. Ixiv’. taken from D. robustus. 
§ 6. Pelvis. 
Of the pelvis of Dinornis more or less complete examples have been described and 
figured in former Memoirs’. 
The least incomplete specimen of the subjects of pl. xix. of the undercited volume? 
afforded a comparison with the pelvis of the Ostrich, the difference from which in that 
of the equally large or larger terrestrial bird is detailed in pp. 253-258 (tom. cit.), and 
exemplified in figs. 2&4. ‘The close resemblance, in the proportions of the pre- and post- 
acetabular parts of the pelvis, to that of the Apteryx' is exemplified in the side view of 
the part in Dinornis dromeoides (pl. xx. fig. 2) and in the under or hemal view of the 
pelvis of Apteryx australis (pl. lv. fig. 1) and that of D. dromioides. A side view 
of a more complete specimen of the pelvis of D. didiformis is given in pl. xx a. fig. 1, 
of the natural size. A less complete pelvis is described and figured in connexion with 
the skeleton of Dinornis elephantopus® ; it agrees in general characters with that of the 
previously described species of the genus. The least incomplete pelvis already described 
and figured is that of the skeleton of Dinornis robustus preserved in the Museum of 
the Philosophical Society of York, and forming the subject of pp. 388-390, pl. xevi. of 
the ‘work.’ But the only perfect example of a dinornithic pelvis which has hitherto 
come to hand is that of Dinornis parvus, the subject of Pls. LIT. & LIV., and 
represented more reduced in the view of the entire skeleton (Pl. LVIIL.). 
The following are dimensions of the pelvis :— 
in. lin. 
Then OG yee ins trae PUSS CoN Sse tae gs =r) coho pel lla 
» anterior to acetabula 5 6 
53 posterior to acetabula . , 4 6 
Breadth (between ends of pelvic bones) . 5 10 
» (across back part of acetabula ) 5 0 
PP of ischium from acetabulum . 4 6 
» of pubis from acetabulum 4 9 
? Trans. Zool. Soc. vol. iv. p. 356. 2 In the ‘ Work,’ locis citatis at p. 91. 
3 Trans. Zool. Soc. vol. iii. 1843, p. 253, pl. xix. (Dinornis giganteus, D. dromeoides, and D. dicdiformis), 
xx. (D. struthioides), and xx a. (D. didiformis). 
* Trans. Zool. Soc. vol. ii. pls. liv. & ly, fig. 1. 
* Ibid. vol. iy. pls. xlvi., xlvii. 
2P2 
