. Transactions and proceedings of the New Zealand Institute . rter, more open, and semi-circular {cb). Beginning with the first sacral vertebra, we observe that the articularsurface of its centrum is broader in a transverse than in a vertical direction,0-69 inch by 0-58 inch. The neural canal has an oval form, its largest diameter,021 inch, being in the vertical line, in this respect resembling Circus; whilst inAquila, and still more in Hieracidea, the canal approaches the circular form. The prezygapophyses {pr) are of middle size and stand forward, theirarticular surface of a rounded shape, b
. Transactions and proceedings of the New Zealand Institute . rter, more open, and semi-circular {cb). Beginning with the first sacral vertebra, we observe that the articularsurface of its centrum is broader in a transverse than in a vertical direction,0-69 inch by 0-58 inch. The neural canal has an oval form, its largest diameter,021 inch, being in the vertical line, in this respect resembling Circus; whilst inAquila, and still more in Hieracidea, the canal approaches the circular form. The prezygapophyses {pr) are of middle size and stand forward, theirarticular surface of a rounded shape, being almost plane. The neural spine isbroad and strong at its base, gradually contracting, and forming only near itscoalescence a small neurapophysial expansion lying between the iliac plates{n). A broad and deep ilio-neural opening is formed on each side of the spinalplate, having a greater vertical than lateral extent, and here again differingfrom the pelvis of the three recent species previously alluded to, the roof m s^^M TRANS. , f^^v^S:^^.. ^5 •^A-Vrf-
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