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I.—Synopsis of the Genera and Species of Carboniferous Limestone Trilobites

Published online by Cambridge University Press:  01 May 2009

Henry Woodward
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Extract

Griffithides, Portlock, 1883.—Outline oblong oval; glabella pyriform, gibbous in front, destitute of lateral furrows; basal lobes inflated; cervical lobe broad; eyes small, lunate, smooth; axial furrow clearly defined, outline of free cheek broadly triangular, outer posterior angle sometimes produced into a cheek spine. Thorax with nine segments; pygidium rounded, composed of from ten to thirteen coalesced somites.

Type
Original Articles
Information
Geological Magazine , Volume 10 , Issue 11 , November 1883 , pp. 481 - 487
Copyright
Copyright © Cambridge University Press 1883

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References

1 There is reason to conclude that one of these spines existed when Portlock wrote his description, although it is only now indicated by a fragment and by the scar where it once rested.

2 The extremity is injured, so that the exact number cannot now be ascertained.