A Manual of Palæontology for the Use of Students with a General Introduction on the Principles of Palæontology

allied animal Annelides aperture appear appendages arms articulated attached basals beaks Bivalves body body-rings Brachiopoda calcareous calice calyx canals carapace Carboniferous cells Chalk chambers closely composed consists corallites corallum corals Cretaceous Crinoids Crustaceans Cystideans deposits Devonian disc dissepiments dorsal valve enlarged Eocene Eurypterids extinct facial sutures Foraminifera formation forms fossil fossil condition furrows genera genus Geol glabella Graptolites grooves head-shield Henry Woodward hinge-line horny Hydrozoa integument Jurassic known Lastly lateral less ligament Limestone living Lower Silurian margin mouth natural occur Oolites Order organs pair palæontologist Palæozoic pallial perforated Permian placed plates pleuræ polypary polypes Polyzoa pores portion posterior present day pygidium radials regarded represented resembles right valve rocks rows Salter segments septa shell side Silurian and Devonian skeleton sometimes species spines Sponges structure sub-kingdom tabulæ teeth Tertiary thorax Trias Trilobites tubercles tubes Upper Cambrian Upper Silurian usually ventral valve whilst Zoantharia