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Volume 14, 1881
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General Description and Measurements.

The skeleton consisting, as it does, of the parts saved after skinning (pl. XIX., figs. 1 and 2) is minus the head and the anterior cervical vertebræ, the wing-bones, the bones of the legs with the exception of the femora, and the posterior caudal vertebræ. It is in very good preservation with the exception of the ribs and the femur on the left side, which are shattered, probably by shot, and the right side of the middle xiphoid process of the sternum, which is slightly cut, apparently during skinning.

The more important measurements are as follows:—

Length of trunk, measured from anterior (dorsal) ends of coracoids to posterior extremity of pelvis 18.5 cm.
Length of scapula 8.0 "
" coracoid 4.2 "
" sternum 6.8 "
Width of "(measured just posterior to coracoid grooves) 4.3 "
Depth of keel of sternum 0.9 "
Length of ilium 10.4 "
Width of pelvis at posterior border of acetabula 5.6 "
Length of femur 10.3 "

For purposes of comparison, however, the absolute dimensions of the parts are of less importance than their proportional dimensions as compared with the corresponding parts in allied genera. I therefore give in

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Notornis.

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the following table the comparative dimensions of the same bones in Notornis, Ocydromus, Tribonyx, and Porphyrio, taking as a standard the length of the trunk as measured from the centre of a line joining the anterior or dorsal ends of the coracoids to the centre of a line joining the posterior boundaries of the pelvis. This, I think, bears a fairly correct relation to the bulk of the bird, and is independent of the length of either neck or legs. Taking this line as equal to 100, the remaining dimensions maybe taken as percentages of the length of trunk, and thus the proportional size of sternum, pelvis, etc., clearly brought out:—

Length of Trunk=100.
Notornis. Ocydromus. Tribonyx. Porphyrio.
Length of sternum 36 28 35 40
Width " 24 14 17.5 17
Depth of carina sterni 4.8 4.7 7 13
Length of scapula. 43 35 39 49
" coracoid 22 20 22.5 28
"ilium 56 49 52 43
Width of " 29 21 22.5 21
Length of femur 57 51 49 51
Coraco-scapular angle 97deg; 100deg; 92deg; 86deg;
Transverse sternal angle 132deg; 141deg; 122deg; 96deg;

Pl. XX. represents outline drawings to scale of the four skeletons, that of Notornis being two-thirds natural size.