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The quadrupeds obtained from that more ancient tuff comprise Elephas meridionalis, Hippopotamus major, Rhinoceros megarhinus, Antilope torticornis, Hyaena brevirostris, and twelve others of the genera horse, ox, stag, goat, tiger, etc., all supposed to be of extinct species.
I am fully convinced that species are not immutable; but that those belonging to what are called the same genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of any one species are the descendants of that species.
The yellow fails in many highly developed flowers, which are not liable to produce yellow variations, as in Salvia, Aster, Centaurea, Vinca, Polygala and many others. Even the rare pale yellowish species of some of these genera have no tendency in this direction.
A patient friend at Kew made me a list of genera and species which, if all went well, should flower in succession. But there was a woeful gap about midsummer just the time when gardens ought to be brightest. Still, I resolved to carry out the scheme, so far as it went, and forwarded my list to Covent Garden for an estimate of the expense. It amounted to some hundreds of pounds.
Of fishes, seventy-five genera and one hundred and seven species are described in the Report. The fisherman will be startled to learn that there are but about a dozen kinds in the ponds and streams of any inland town; and almost nothing is known of their habits. Only their names and residence make one love fishes.
Nor, again, can any such reply be made to the fact that there are far more numerous orders and genera of mammalian remains in the tertiary formations than in the secondary formations. Did we wish merely to make out the best case, we might dwell upon the opinion of Dr.
This gradual increase in number of the species of a group is strictly conformable with my theory; as the species of the same genus, and the genera of the same family, can increase only slowly and progressively; for the process of modification and the production of a number of allied forms must be slow and gradual, one species giving rise first to two or three varieties, these being slowly converted into species, which in their turn produce by equally slow steps other species, and so on, like the branching of a great tree from a single stem, till the group becomes large.
If numerous species, belonging to the same genera or families, have really started into life at once, the fact would be fatal to the theory of evolution through natural selection.
I refer to Cuvier's investigation of the mammalian fossils yielded by the quarries in the older tertiary rocks of Montmartre, among the chief results of which was the bringing to light of two genera of extinct hoofed quadrupeds, the Anoplotherium and the Palaeotherium.
But when the new Logician, who was the new Magician, came, with 'the part operative' of his speculation; with his 'New Machine, with the rod of his new definition, with the staff of his genera and species, when the right name was found for it, it heard, it heard afar, it heard in its heaven and came. It came fast enough then. It was 'asleep, but it awaked. It was 'taking a journey' but it came.
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