 The upper valve is almost invariably wanting, though occasionally found in a perfect state of preservation in the white chalk at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines,...  The Student's Elements of Geology - Página 21por Sir Charles Lyell - 1885 - 641 páginasVista completa - Acerca de este libro
 | Sir Charles Lyell - 1838 - 582 páginas
...,„ Crania detached. which were carried a way. 1 lieu the young Crania adhered to the bared shell, and perished in its turn ; after which the upper valve was separated from the lower before the Echinus became enveloped in chalky mud. It may be well to mention one more illustration of the manner... | |
 | Sir Charles Lyell - 1841 - 946 páginas
...vmlve of the' Crania attached. and lost its spines, which were 6. Upper valve of the crania detached. carried away. Then the young Crania adhered to the...upper valve was separated from the lower before the Echinus became enveloped in chalky mud. It may be well to mention one more illustration of the manner... | |
 | Sir Charles Lyell - 1841 - 486 páginas
...from youth to age, then died with lower valve of the ' >d lost its sPines> which were Cromadeuched. Crania adhered to the bared shell, grew, and perished...upper valve was separated from the lower before the Echinus became enveloped in chalky mud. It may be well to mention one more illustration of the manner... | |
 | Sir Charles Lyell - 1845 - 338 páginas
...white chalk at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines which were carried away. Then the young a. EcMntut from the Crania adhered to the bared shell, and perishva?ve'oftthe'Cra7ii'i ed 'n its turn... | |
 | Sir Charles Lyell - 1851 - 602 páginas
...white chalk at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines, which were...after which the upper valve was separated from the tue lower before the Echinus became enveloped in chalky mud. It may be well to mention one more illustration... | |
 | Sir Charles Lyell - 1852 - 578 páginas
...white chalk at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines, which were...turn; after which the upper valve was separated from Crania attached. the lower before the Echinus became enveloped in Crania detached. chalky III 11i1.... | |
 | Sir Charles Lyell - 1854 - 556 páginas
...clearly that the sea-urchin first lived from youth to age, then died and lost its spines, which wciv carried away. Then the young Crania adhered to the...perished in its turn; after which the upper valve was attached. separated from the lower before the Echinus became !>. Upper vaKe of the r . Crania detached,... | |
 | Sir Charles Lyell - 1855 - 686 páginas
...white chalk at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines, which were...perished in its turn ; after which the upper valve was attached. separated from the lower before the Echinus became ». Upper valve of th« * Crania detached,... | |
 | Sir Charles Lyell - 1866 - 910 páginas
...white chalk at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines, which were...young Crania adhered to the bared shell, grew and _j" Crania perished in its turn; after which the upper valve was attached. separated from the lower... | |
 | Sir Charles Lyell - 1866 - 866 páginas
...r T . • at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines, which were carried away. Then the from the young Crania adhered to the bared shell, grew and vafve'ofthe Crmia perished in its turn ;... | |
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