Abstract
Among the Crustacea from the Coal-measures of Coseley, near Dudley, which have been lent to me for examination by Mr. Walter Egginton, are a number of specimens of a form probably identical with that described by Dr. Henry Woodward as Prœanaspides prœcursor. These specimens make it possible to supplement, in some important particulars, the original account of the species, and throw fresh light on its relations to the living Syncarida. Reasons are given below for regarding the genus Prœanaspides as a synonym of Palœocaris, Meek & Worthen.

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