Genera

Examples

• In this respect, therefore, the species of the larger genera resemble varieties, more than do the species of the smaller genera. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• In genera having more than the average number of species in any country, the species of these genera have more than the average number of varieties. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Thus, as I believe, species are multiplied and genera are formed. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• The archipelago, though not rich in insects, afforded several new genera, each island with its distinct kinds. Walter Libby. An Introduction to the History of Science.
• On the lofty mountains of equatorial America a host of peculiar species belonging to European genera occur. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Thus it is, as I believe, that two or more genera are produced by descent with modification, from two or more species of the same genus. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• The six descendants from (I) will form two sub-genera or genera. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• There are other relations between the species of large genera and their recorded varieties which deserve notice. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• If the plants inhabiting a country as described in any Flora, be divided into two equal masses, all those in the larger genera (i. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Species belonging to different genera and classes have not changed at the same rate, or in the same degree. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Altogether no less than ten genera are enumerated, which include species that imitate other butterflies. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Fifteen new species of sea-fish were obtained, distributed in twelve genera. Walter Libby. An Introduction to the History of Science.
• On the Silla of Caraccas the illustrious Humboldt long ago found species belonging to genera characteristic of the Cordillera. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• But, by steps hereafter to be explained, the larger genera also tend to break up into smaller genera. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• We will suppose the letters A to L to represent allied genera existing during the Silurian epoch, and descended from some still earlier form. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• But so many causes tend to obscure this result, that I am surprised that my tables show even a small majority on the side of the larger genera. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• If the extreme forms in the genus happen to have been thus destroyed, the genus itself will stand more distinct from other allied genera. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• The species and even the genera of many large natural families are so closely allied together that it is difficult to distinguish not a few of them. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Mr. Gould remarked to me long ago, that in those genera of birds which range over the world, many of the species have very wide ranges. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• In certain genera of star-fishes, the very combinations needed to show that the pedicellariae are only modified branching spines may be found. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• I see no reason to limit the process of modification, as now explained, to the formation of genera alone. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Although many distinct genera within the same family have been grafted together, in other cases species of the same genus will not take on each other. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• We may instance Rubus, Rosa, and Hieracium among plants, several genera of insects, and of Brachiopod shells. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• We may suppose that the numbered letters in italics represent genera, and the dotted lines diverging from them the species in each genus. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• We have seen that in each country it is the species belonging to the larger genera which oftenest present varieties or incipient species. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• We shall also have two very distinct genera descended from (I), differing widely from the descendants of (A). Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Classes, genera, and species of animals appear and disappear, but the range widens. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
• In some other genera they are present, but in a rudimentary condition. Charles Darwin. On the Origin of Species by Means of Natural Selection.
• Those genera survive which give rise t o species adapted to new conditions of existence. Walter Libby. An Introduction to the History of Science.
• In most polymorphic genera some of the species have fixed and definite characters. Charles Darwin. On the Origin of Species by Means of Natural Selection.

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