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III.—Notes on Palæozoic Crustacea

Published online by Cambridge University Press:  01 May 2009

Henry Woodward
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Extract

Among the many relics of Palæozoic life-forms which the Carboniferous formation has yielded to the palæontologist, none is more remarkable than “Scouler's Eidothea,” or the Eurypterus Scouleri of Hibbert.

Type
Original Articles
Information
Geological Magazine , Volume 6 , Issue 5 , May 1879 , pp. 196 - 199
Copyright
Copyright © Cambridge University Press 1879

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References

1 As the antennules in the Eurypterida are, theoretically, considered to be aborted, the headshield would be really composed of the 7 cephalic and the 1st thoracic somites; but the Roman numerals only indicate the number of somites coalesced in the head-shield which are actually represented by paired appendages, reckoning the optic segment as the first, and the thoracic plate or operculum as the seventh.