On some New Species of Crustacea belonging to the Order Eurypterida

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Abstract
H aving last year visited, in company with Mr. James Powrie, F.G.S., certain localities in the vicinity of Forfar, Arbroath, and Dundee, noted for the occurrence of Devonian Crustacea, I am now enabled, through the kindness of my friend, to describe some interesting remains of two new species of the genus Stylonurus . This genus was proposed by Mr. David Page in his paper read before the British Association, at Glasgow, 1855, and the name was published in his ‘Advanced Text-Book of Geology’ 1856, where he also figured and named the then only known species belonging to that genus— Stylonurus Powriei (after its discoverer), but without giving any description. Since that date much better materials for the illustration of this genus have been afforded by the labours of Messrs. James Powrie and Robert Slimon. 1. S tylonurus P owriei , Page. This species occurs in the Old Red Sandstone of the Turin Hill range, near Pitscandly, in Forfarshire. The most important characters by which the genus is distinguished are the peculiar form of the carapace, the great length of the telson or terminal joint (in S. Powriei one-third the length of the entire animal), and the substitution of two pairs of long, slender, oar-like jaw-feet, instead of the single pair of broad, short natatory organs more usually met with in this group. The impression and counterpart of S. Powriei (Page), being only on sandstone, and, in all probability, the interior side of the upper surface, do not afford such good material for description as the specimens

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