On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
From inside the book
Results 1-5 of 23
Page 117
... crustaceans , in which several parts of the structure become less perfect , so that the mature animal cannot be called higher than its larva . Von Baer's standard seems the most widely applicable and the best , namely , the amount of ...
... crustaceans , in which several parts of the structure become less perfect , so that the mature animal cannot be called higher than its larva . Von Baer's standard seems the most widely applicable and the best , namely , the amount of ...
Page 149
... the neuration differs in the different species , and likewise in the two sexes of the same species . Mr. Lubbock has recently remarked , that several minute crustaceans offer excellent illustrations LAWS OF VARIATION 149.
... the neuration differs in the different species , and likewise in the two sexes of the same species . Mr. Lubbock has recently remarked , that several minute crustaceans offer excellent illustrations LAWS OF VARIATION 149.
Page 150
... crustaceans offer excellent illustrations of this law . " In Pontella , for instance , the sexual characters are afforded mainly by the anterior antennæ and by the fifth pair of legs : the specific differences also are principally given ...
... crustaceans offer excellent illustrations of this law . " In Pontella , for instance , the sexual characters are afforded mainly by the anterior antennæ and by the fifth pair of legs : the specific differences also are principally given ...
Page 151
... but in certain genera the neuration differs in the different species , and likewise in the two sexes of the same species . Mr. Lubbock has 66 recently remarked , that several minute crustaceans offer excellent LAWS OF VARIATION 149.
... but in certain genera the neuration differs in the different species , and likewise in the two sexes of the same species . Mr. Lubbock has 66 recently remarked , that several minute crustaceans offer excellent LAWS OF VARIATION 149.
Page 151
... crustaceans offer excellent illustrations of this law . In Pontella , for instance , the sexual characters are afforded mainly by the anterior antennæ and by the fifth pair of legs : the specific differences also are principally given ...
... crustaceans offer excellent illustrations of this law . In Pontella , for instance , the sexual characters are afforded mainly by the anterior antennæ and by the fifth pair of legs : the specific differences also are principally given ...
Other editions - View all
Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely