A monograph of the British fossil corals; 2d ser

by P. Martin Duncan

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1866 edition. ...Gault, Folkestone. In the British Museum. Variety 2 (PI. XIII, figs. 3, 4).--The corallum is as large as that of variety 1, but it is more conical. The costae are less pronounced, and the septa, which are more granular than those of variety 1, arise from the intercostal spaces. The costal ends are very elegant in shape, and form a margin of rather sharp curves, side by side. Locality. Gault, Folkestone. In the British Museum. Variety 3 (PI. XII, figs. 1, 3, 4; and PI. XIII, fig. 13).--The corallum is rather flat, but hemispherical. The septa are not exsert, and they arise from the costal ends. The costae are equal; none are more prominent than others. They are all rather broad, flat, and beautifully ornamented with diverging curved lines. Their free ends are equal and curved. Locality. Gault, Folkestone. In the Collection of the Rev. T. Wiltshire, F.G.S. Variety 4.--The corallum and costae are like Variety 3, but the septa arise from the intercostal spaces. Locality. Gault, Folkestone. In the Collection of the Rev. T. Wiltshire, F.G.S. Variety 5 (PI. XII, fig. 2).--The corallum is rather more conical inferiorly than in Varieties 3 and 4. The septa are exsert, and project slightly beyond the costal margin. The costae are all rudimentary. The epitheca is well developed, and reaches up to the septa. Locality. Gault, Folkestone. All the forms have four cycles of septa and pali before the first, second, and third orders. An ill-developed and monstrous form is shown in PI. XIV, figs. 1--5. 2. Trochocyathus Wiltshirei, Duncan. PI. XIV, figs. 10--12. The corallum is straight, conical, and either cylindrical above or compressed. Its base presents the trace of a peduncle for attachment. The epitheca is scanty and in transverse masses. The costae are...

88 pages, Paperback

First published January 27, 1866

About the author

Peter Martin Duncan FRS (20 April 1821 – 28 May 1891) was an English palaeontologist.

He was the father of zoologist Francis Martin Duncan