. Transactions and proceedings of the New Zealand Institute . ches across, undoubtedly belong to A. tuberculata, Shaw. The descriptiongiven is defective, yet a comparison of the shell with drawings by Chenu,Eeeve, and other authors, is conclusive. I propose to amend the description as follows :— Shell compressed,sides with transverse plications which are longitudinally nearly square posteriorly, margin much thickened, and the anglesproduced outwards so as to form pointed wing-like processes, projectingbeyond the sides of the shell. Keels two, with compressed tubercles,
. Transactions and proceedings of the New Zealand Institute . ches across, undoubtedly belong to A. tuberculata, Shaw. The descriptiongiven is defective, yet a comparison of the shell with drawings by Chenu,Eeeve, and other authors, is conclusive. I propose to amend the description as follows :— Shell compressed,sides with transverse plications which are longitudinally nearly square posteriorly, margin much thickened, and the anglesproduced outwards so as to form pointed wing-like processes, projectingbeyond the sides of the shell. Keels two, with compressed tubercles, white,brown on the spire, where also the keel tubercles are blackish-brown. What I now consider to be a new species is distinguishable from theforegoing at a glance. The whole shell has a more graceful and regularoutline, and is much more fragile looking, the aperture is narrower androunded, especially posteriorly, there is no sign whatever of wing-likeexpansions, indeed the sides have a graceful sweep where the angle occurs TRANS. NZ!NSTITIITE,
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Keywords: ., bookcentury1800, bookdecade, booksubjectbirds, booksubjectscience
