Transactions of the Royal Society of New Zealand . y. PORPHYRIO y/// y OCYDPOMUS fV/VOTOf^^J/S. Paekek.—On Notornis mantelli. 249 and 4a (pi. XXI.), the former showing the outline of the sternum ofNotornis from the ventral face with that of Ocydromus superposed in dottedoutline on the left side, and that of Porphyrio in broken outline on theright; while fig. 4a shows the right half of the sternum of Notornis withthat of Trihonyx superposed in dotted outline. The sternum of Notornis is broad and flat; its anterior edge is somewhatemarginate, as in Ocydromus, and is devoid of all trace of the ma
Transactions of the Royal Society of New Zealand . y. PORPHYRIO y/// y OCYDPOMUS fV/VOTOf^^J/S. Paekek.—On Notornis mantelli. 249 and 4a (pi. XXI.), the former showing the outline of the sternum ofNotornis from the ventral face with that of Ocydromus superposed in dottedoutline on the left side, and that of Porphyrio in broken outline on theright; while fig. 4a shows the right half of the sternum of Notornis withthat of Trihonyx superposed in dotted outline. The sternum of Notornis is broad and flat; its anterior edge is somewhatemarginate, as in Ocydromus, and is devoid of all trace of the manubrium orrostrum (fig. 4, 4a, r) found in Porphyrio, and to a less degree in Tribonyx. Thecoracoid grooves are even more widely separated than in Ocydromus, insteadof having merely the width of the rostrum between them, as in the othergenera. The diminution in width of the sternum from its anterior to itsposterior end is very gradual; in this respect Notornis most nearly approachesTrihonyx. The external xiphoid processes [e. ) are divergent,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1881
