A Manual of Palaeontology for the Use of Students: With a General Introduction on the Principles of Palaeontology |
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Page 68
... genus is that of a hollow cone or hollow cylinder , enclosing a large cup - shaped cavity , and tapering towards one ex- tremity , which was presum- ably fixed to some foreign body . Specimens appear to have reached a very large size ...
... genus is that of a hollow cone or hollow cylinder , enclosing a large cup - shaped cavity , and tapering towards one ex- tremity , which was presum- ably fixed to some foreign body . Specimens appear to have reached a very large size ...
Page 69
... genus Favo- spongia ; and here , as well as in the Lower Silurians , we have the singular genus Stromato- pora , which will be spoken of immediately . In the Devonian Rocks , the genus Sparsispongia may be noted ; but the Carboniferous ...
... genus Favo- spongia ; and here , as well as in the Lower Silurians , we have the singular genus Stromato- pora , which will be spoken of immediately . In the Devonian Rocks , the genus Sparsispongia may be noted ; but the Carboniferous ...
Page 71
... genus Cliona alone , comprising the singular boring sponges , has managed to survive from the commence- ment of the Paleozoic period to the present day . Shells mined by species of this genus occur in the Silurian Rocks , and the genus ...
... genus Cliona alone , comprising the singular boring sponges , has managed to survive from the commence- ment of the Paleozoic period to the present day . Shells mined by species of this genus occur in the Silurian Rocks , and the genus ...
Page 79
... genus Oldhamia may be noticed here , as they have been referred to the Hydrozoa ; though their true nature is altogether uncertain . Oldhamia occurs in certain green and purple grits of Lower Cambrian age , at Bray Head , in Wicklow ...
... genus Oldhamia may be noticed here , as they have been referred to the Hydrozoa ; though their true nature is altogether uncertain . Oldhamia occurs in certain green and purple grits of Lower Cambrian age , at Bray Head , in Wicklow ...
Page 83
... genus Didymograpsus ( fig . 31 ) , the polypary con- sists of two simple monoprionidian branches , which spring from a common point , which is almost invariably marked by a small spine - like " radicle . " The genus attains its maximum ...
... genus Didymograpsus ( fig . 31 ) , the polypary con- sists of two simple monoprionidian branches , which spring from a common point , which is almost invariably marked by a small spine - like " radicle . " The genus attains its maximum ...
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abundant allied ambulacral anchylosed animal aperture appear appendages articulated attained beak beds belong Birds Bivalves body bones bony Brachiopods calcareous calyx Cambrian Carboniferous Carboniferous Rocks Cephalopods Chalk characterised clavicles commence composed comprising consists coral Cretaceous Cretaceous period Crinoids Crustaceans deposits Devonian division dorsal Eocene Eocene Tertiary existing extinct feet fins fishes Foraminifera formation forms fossil Ganoids genera genus gills Graptolites horny Hydrozoa incisors integument Jurassic known Lastly latter less limbs Limestone living lower jaw Lower Silurian Mammals margin Mesozoic Miocene molars Mollusca mouth occur Oolites operculum pair Paleozoic pectoral Permian placed plants plates Pliocene Polyzoa possession Post-Pliocene Post-Tertiary posterior present day regarded remains represented Reptiles ribs Sandstone segments septa shell side Silurian Rocks single siphuncle skeleton sometimes spines strata structure sub-kingdom sub-order surface sutures tail teeth toes Trias Triassic tube Upper Cambrian Upper Silurian usually vertebræ whilst whorls Zoantharia
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Page ii - A Manual of Palaeontology, for the Use of Students. With a General Introduction on the Principles of Palaeontology.
Page 607 - STORMONTH. Etymological and Pronouncing Dictionary of the English Language. Including a very Copious Selection of Scientific Terms. For Use in Schools and Colleges, and as a Book of General Reference. By the Rev. JAMES STORMONTH. The Pronunciation carefully Revised by the Rev. PH PHELP, MA Cantab. Tenth Edition, Revised throughout. Crown 8vo, pp. 800. 7s. 6d. Dictionary of the English Language...