A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) (1907) (14592564009)

Paleozoic Anthozoa: a: A Rugose Zoantharian Coral, Omphyma subterminatum, from the Wenlock Limestone, b: supposed Alcyonarian, Syringopora ramulosa, from the Carboniferous Limestone of Yorkshire
Identifier: guidetofossilinv00brit (find matches)
Title: A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history)
Year: 1907 (1900s)
Authors: British Museum (Natural History). Dept. of Geology Bather, Francis Arthur, 1863-
Subjects: Fossils
Publisher: London, Printed by order of the Trustees



Text Appearing Before Image:
l tubes are of equal size, in others some tubes are muchsmaller; it is probably an Alcyonarian. Aulopora, apparentlyan ally, grows in a low network over shells and corals(Fig. 21 c). A slab of Silurian limestone from Gotland,between Wall-cases 5 and 6, is largely composed of Favositesand Halysites. Table-case In the next Case are Silurian Zoantharia Eugosa or7- Tetracoralla. Here come the conical Omphyma with root-like supports (Fig. 22 a), the broadly spreading cups of COELENTEEA— CORALS. 53 ^ Ptychopliyllum, the disc-shaped Palaeocychts, the massive Gallery X.colonies of Stromhodes. In the next compartment is Cysii-phyllum, in which the lower part of the calyx is divided bydissepiments into a vast number of tiny chambers or cysts.In the allied Goniophyllum and Bhizophyllum the calyxwas closed by a movable lid. On the other side of theCase is Cyathopliyllum, some specimens of which showseveral young budding from the calyx of the parent. Lastis the allied colonial form Acerviolaria.
Text Appearing After Image:
Fig. 22.—Palaeozoic Anthozoa. a, a Eugose Zoantharian Coral, Omphymasubtnrbinatum, from the Wenlock Limestone. About J natural size.(From Prestwichs Geology.) (See Table-case 7.) b, a supposedAlcyonarian, Syringopora ramulosa, from the Carboniferous Limestoneof Yorkshire. Enlarged 3 diameters. (Table-case 5.) Of the Devonian corals, the Favositidae fill the rest ofCase 7. Here is Pleurodictyum, frequently associated witha worm, as better seen in the specimens from the Eifel; asimilar association is common in Heliofora. These and theDevonian Zoantharia are mostly of the same genera as theSilurian corals; but they grew more luxuriantly in reefs,which now form the massive limestones of Eifelian age inSouth Devon. Here the specimens have to be studied inpolished sections, some of which are of great beauty; onemay particularly note Pacliypora cervicornis in the black Table-ease7. Wall-ease5a. Table-ease6.SlabbetweenWall-eases4&5. Table-ease6. 54 GUIDE TO THE FOSSIL INVEETEBEATE ANIMA