Volume 3

A monograph of the British fossil crustacea, belonging to the order merostomata / by Henry Woodward.

  • Henry Woodward
Date:
[between 1860 and 1869]
Catalogue details

Licence: Public Domain Mark

Credit: A monograph of the British fossil crustacea, belonging to the order merostomata / by Henry Woodward. Source: Wellcome Collection.

    9/82 page 71
    or THE BRITISH FOSSIL CRUSTACEA OF THE Oedee merostomata. PART III. Genus 1.—Pterygotus, Agassiz.— Continued. Species 3.—PTERYGOTUS RANICEPSH. Woodward. 1868. PI. XVI, fig. 1. Pterygotus raniceps, H. Woodward. Quart. Journ. Geol. Soc., 1868, vol. xxiv, p. 294, pi. ix, fig. 3. Our knowledge of this species is confined to a single specimen obtained, like the preceding one, by Mr. Robert Sliinon from the hard flaggy shales (Upper Silurian) of Logan Water, near Lesmahagow, Lanarkshire (see pages 46—52). Head-shield obtusely triangular. Eyes prominent, marginal. Breadth of posterior border of carapace 6 lines; greatest length 4^ lines, from posterior border to eyes 3 lines; breadth of carapace at eyes 3^ lines; diameter of eye 1 line.^ A small depression marks the centre of the carapace between the eyes, and a small elevation may be seen slightly posterior to them, also on the median line. Larval eye-spots not visible. Length of the six segments 7^ lines, greatest breadth 9 lines; no ornamentation is preserved upon any part of the integument. The specimen here described and figured is preserved in the British Museum. REMAINS OP PTERYGOTUS PROM THE WEST OF ENGLAND. The following seven species^ are given upon the authority of Mr. J. W. Salter, the late eminent Palaeontologist to the Geological Survey, who had devoted many years to the investigation of this group ; namely ; ' This tubercle probably marks the position of the ocelli. 2 An eighth species, Pterygotus punctatus, Salter, has, since its publication, been determined to belong to the genus Eurypterus (see ‘Quart. Journ. Geol. Soc.,’ 1868, paper by H. Woodward, “On some New Species of Crustacea,” &c., vol. xxiv, p. 290, plates ix and x).
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