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III.—On scottish Monograptidæ

Published online by Cambridge University Press:  01 May 2009

Charles Lapworth
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Extract

Polypary four or five inches in length, straight or very slightly curved, attaining a maximum diameter of one-twelfth of an inch. Hydrothecæ short and broad cups, with subquadrangular section, 20 to 24 to the inch, without overlap, inclined at an angle of about 45°; outer edge convex distally, proximally impressed; apertural margin deep, concave, at right angles to the general direction of the theca; denticle triangular and inornate.

Type
Original Articles
Information
Geological Magazine , Volume 3 , Issue 8 , August 1876 , pp. 350 - 360
Copyright
Copyright © Cambridge University Press 1876

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References

page 358 note 1 Geol. Mag. Vol. V. p. 127.Google Scholar

page 358 note 2 Defense de Colonies, part iv. p. 25.