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III.—On Pleurocaris, a new Crustacean from the English Coal-measures

Published online by Cambridge University Press:  01 May 2009

W. T. Calman
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Extract

Through the kindness of Mr. Walter Egginton I have recently had an opportunity of studying an interesting series of Crustacea from the Coal - measures of Coseley, near Dudley. Most of the specimens can be referred, with more or less probability, to the division Syncarida, which includes the living Anaspides and its allics, and among them are some which I regard as representing a new genus. Although the fossils, which are contained in nodules of clayironstone, often show very minute details of structure in a beautifully perfect state, it is just those features most important from a morphological point of view that are most frequently obscured. There are many essential points that cannot be determined from the material at my disposal, and the conclusions drawn as to the systematic affinities of the genus must therefore be regarded as to some extent provisional.

Type
Original Articles
Information
Geological Magazine , Volume 8 , Issue 4 , April 1911 , pp. 156 - 160
Copyright
Copyright © Cambridge University Press 1911

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References

page 156 note 1 For a diagnosis of the genus see p. 160.Google Scholar

page 159 note 1 The genus Acanthotelson was established by Meek, & Worthen, in 1865 (Proe. Acad. Nat. Sci. Philadelphia, 1865, p. 46)Google Scholar for two species, A. stimpsoni and A. inœqualis, which were more fully described and figured in the following year (Geol. Surv. Illinois, ii, p. 399).Google Scholar In 1868 (Amer. Jour. Sei. (2), xlvi, p. 27,Google Scholar and Geol. Surv. Illinois, iii, p. 549)Google Scholar the same authors added a new species, A. eveni, and withdrew A. inaœqualis as founded on an imperfect specimen of Palæocaris, giving also a fuller description of A. stimpsoni and additional figures. Packard, in 1886 (Mem. Nat. Acad. Sci. Washington, iii (2), mem. 15, p. 123)Google Scholar discussed the genus, for which he established the group Syncarida, and gave a restoration of A. stimpsoni.

page 159 note 2 Trans. Eoy. Soc. Edinburgh, xxxviii, pi. iv, p. 799, 1896;Google Scholar Ann. Mag. Nat. Hist. (7), xiii, p. 155, 1904;Google Scholar Lankester's, Treatise on Zoology, pt. vii, fasc. 3, Crustacea, p. 167, 1909.Google Scholar

page 159 note 3 Natural Science, xi, p. 252, 1897.Google Scholar

page 159 note 4 Quart. Jour. Micr. Sci., liii, p. 500, 1909.Google Scholar