The American Naturalist, Volumen21Essex Institute, 1887 |
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Página 606
... existence , in the course of which the fittest will survive . In other words , that plant or animal will be the most likely to live and continue to propagate its species which can best succeed in crowding out . some of its competitors ...
... existence , in the course of which the fittest will survive . In other words , that plant or animal will be the most likely to live and continue to propagate its species which can best succeed in crowding out . some of its competitors ...
Página 607
... existence . So it is with all other weapons of defence or offence that have been developed by use . Their principal purpose has been to enable their possessor to live , and , as the strongest and the one best provided with good weapons ...
... existence . So it is with all other weapons of defence or offence that have been developed by use . Their principal purpose has been to enable their possessor to live , and , as the strongest and the one best provided with good weapons ...
Página 615
... the same curious forms of stems adapted to a plant's existence in dry and arid regions form curious features in the homes of civilized man . METHODS OF INSTRUCTION IN GENERAL GEOLOGY.1 BY H. S. WILLIAMS 1887 ] 615 The Milkweeds .
... the same curious forms of stems adapted to a plant's existence in dry and arid regions form curious features in the homes of civilized man . METHODS OF INSTRUCTION IN GENERAL GEOLOGY.1 BY H. S. WILLIAMS 1887 ] 615 The Milkweeds .
Página 640
... existence of the inscriptions until after their discovery by the whites , although the plateau was for many years a general rendezvous for them as a sporting - ground . As a matter of incidental antiquarian interest here , it may be ...
... existence of the inscriptions until after their discovery by the whites , although the plateau was for many years a general rendezvous for them as a sporting - ground . As a matter of incidental antiquarian interest here , it may be ...
Página 658
... existence of Condylarthra in Európe is to be expected . The order may have been of wide distribution in the Northern and possibly in the Southern Hemisphere , but we have as yet no evidence of its existence out of North America . - E ...
... existence of Condylarthra in Európe is to be expected . The order may have been of wide distribution in the Northern and possibly in the Southern Hemisphere , but we have as yet no evidence of its existence out of North America . - E ...
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Amer AMERICAN NATURALIST animals appear Artiodactyla Bering Island bones botany breed called cells character chemical color compounds conclusions Condylarthra contains crystals cusps described dike E. D. Cope Eocene evolution eyes facts fauna feet figures fossils four Gard genera genus geological geologists geology Göhrde groups Heptodon hornblende hornless stags horns hundred Hyracotherium Ichthyosaurus incisors inferior molar infra-spinous insects Island J. B. LIPPINCOTT COMPANY known Lambdotherium larvæ lower Menodus mineral Miocene molars natural North notes observed occur original paper Philadelphia plane plants plates polled cattle pollinia portion premolars present probably Proc Prof Professor Protohippus published recently region represented River rocks sandstone says scapular scapular index schists scientific sea-cow sections seen side skull species specimens Spiders structure student superior molars synonymy Taconic teeth tion varieties Vilmorin XXI.-NO