Geology and Mineralogy Considered with Reference to Natural Theology, Parte 1W. Pickering, 1836 - 599 páginas |
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Página 147
... more readily than the harder plates of enamel , ( b b ) . We find a further nicety of mechanical contrivance , for pro- ducing and maintaining two transverse wedges upon the surface Pl . 6 , W. X. represents the manner in MEGATHERIUM . 147.
... more readily than the harder plates of enamel , ( b b ) . We find a further nicety of mechanical contrivance , for pro- ducing and maintaining two transverse wedges upon the surface Pl . 6 , W. X. represents the manner in MEGATHERIUM . 147.
Página 148
... transverse portions of the plate of enamel , which is interposed between the external crust , ( a ) , and the central ivory , ( c ) . Had this enamel been of uniform thickness all round the central ivory , the tooth would have worn down ...
... transverse portions of the plate of enamel , which is interposed between the external crust , ( a ) , and the central ivory , ( c ) . Had this enamel been of uniform thickness all round the central ivory , the tooth would have worn down ...
Página 176
... plates of elastic wood , or steel , to make a cross- bow ; and also in setting together thin plates of steel in the ... transverse sections , indicated by the lines immediately above them in Fig . 2. Fig . 8 , shews the composition of ...
... plates of elastic wood , or steel , to make a cross- bow ; and also in setting together thin plates of steel in the ... transverse sections , indicated by the lines immediately above them in Fig . 2. Fig . 8 , shews the composition of ...
Página 179
... Plates 7 , 8 , 9 ) ; and in this respect agree with the structure of modern Lizards . A considerable number of them ... transverse apophysis of the head of the rib articulates with the vertebra , is seen at d . The ribs of the right side ...
... Plates 7 , 8 , 9 ) ; and in this respect agree with the structure of modern Lizards . A considerable number of them ... transverse apophysis of the head of the rib articulates with the vertebra , is seen at d . The ribs of the right side ...
Página 195
... transverse section of another Coprolite from the lias , shewing the manner in which the plate coils round itself , till it terminates externally in a broken edge , ( at b ) . In all the figures the letter b , marks the transverse ...
... transverse section of another Coprolite from the lias , shewing the manner in which the plate coils round itself , till it terminates externally in a broken edge , ( at b ) . In all the figures the letter b , marks the transverse ...
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Términos y frases comunes
adapted afford Agassiz air chambers Ammonites ancient animal and vegetable appear Articulated Baculites beds Belemnite body bones bony bottom calcareous Carboniferous cavity Chalk chambered shells character clay Coal formation composed condition Coniferæ contrivances Coprolites creation creatures Cretaceous Crocodiles Crustaceans Cuvier Cycadeæ deposits derived Dicotyledonous earth enamel Eningen entire evidence existing external shell extinct species feet Ferns fluid fossil fossil Fishes fossil species genus Geology globe horny Ichthyosaurus Iguanodon important inhabitants ink-bag land limestone living Lizards lobes Lyme Regis Mammalia marine mechanical Megatherium mineral Mollusks nature Nautilus nearly occur Oolite organic remains peculiar perfect period plants Plesiosaurus portion present probably Pterodactyle quadrupeds recent represents reptiles resembling ribs rocks sand sandstone Secondary shews similar siphuncle skeleton specimen stems strata stratum structure surface teeth Tertiary formations tion tooth Trans transverse plates Trilobites trunk vertebræ vertebral column whilst