Cover illustration: Engraving of the Early Cambrian trace fossil Oldhamia antiqua from Bray Head, Ireland. Reproduced by kind permission of the Royal Irish Academy © RIA (Kinahan J.R. 1856. The Genus Oldhamia (Forbes): Its Character, Probable Affinities, Modes of Occurrence, and a Description of the Nature of the Localities in Which It Occurs in the Cambrian Rocks of Wicklow and Dublin. The Transactions of the Royal Irish Academy, 23, 547–561). Individual fans 2–3 cm across.

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封面插图：来自爱尔兰布雷角的早期寒武纪痕迹化石Oldhamia antiqua的雕刻。经爱尔兰皇家学院许可转载 © RIA (Kinahan JR 1856. The Genus Oldhamia (Forbes)：它的特征、可能的亲缘关系、发生模式以及它在寒武纪岩石中发生的地点的性质描述威克洛和都柏林。爱尔兰皇家学院汇刊，23, 547–561)。单个扇形 2-3 厘米。