any secondary formation, seemed fully to justify the belief that this great and distinct order had been suddenly produced in the interval between the latest secondary and earliest tertiary formation. But now we may read in the Supplement to Lyell's 'Manual,' published in 1858, clear evidence of the existence of whales in the upper greensand, some time before the close of the secondary period. |
|
I may give another instance,
which which 1859 1860 | which, 1861 1866 1869 1872 |
from having passed under my own
eyes eyes 1859 1860 | eyes, 1861 1866 1869 1872 |
has much struck me. In a memoir on Fossil Sessile Cirripedes, I
have have 1859 1860 1861 1866 1869 | have 1872 |
stated that, from the
number number 1859 1860 1861 1866 | large number 1869 1872 |
of existing and extinct tertiary species; from the extraordinary abundance of the individuals of many species all over the world, from the Arctic regions to the equator, inhabiting various zones of depths from the upper tidal limits to 50 fathoms; from the perfect manner in which specimens are
preserved preserved 1859 1860 1861 1869 1872 | pre- served 1866 |
in the oldest tertiary beds; from the ease with which even a fragment of a valve can be recognised; from all these circumstances, I inferred
that that 1859 1860 1861 | that, 1866 1869 1872 |
had sessile cirripedes existed during the secondary periods, they would certainly have been preserved and discovered; and as not one species had
been been 1859 | then been 1860 1861 1866 1869 1872 |
discovered in beds of this age, I concluded that this great group had been suddenly developed at the commencement of the tertiary series. This was a sore trouble to me, adding as I
thought thought 1859 1860 1861 1866 1869 | then thought 1872 |
one more instance of the abrupt appearance of a great group of species. But my work had hardly been published, when a skilful palæontologist, M. Bosquet, sent me a drawing of a perfect specimen of an unmistakeable sessile cirripede, which he had himself extracted from the chalk of Belgium. And, as if to make the case as striking as possible, this
sessile sessile 1859 1860 1861 1866 1869 | sessile 1872 |
cirripede was a Chthamalus, a very common, large, and ubiquitous genus, of which not one
specimen specimen 1859 1860 1861 1866 1869 | species 1872 |
has as yet been found even in any tertiary
|