The American Naturalist, Volumen21Essex Institute, 1887 |
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Página 675
... external development adds but little to our previous knowledge , the principal points being that the mandibular segment is budded from the cephalic one , that Crone- berg's antennæ are the rudiments of the upper lip , and that no ...
... external development adds but little to our previous knowledge , the principal points being that the mandibular segment is budded from the cephalic one , that Crone- berg's antennæ are the rudiments of the upper lip , and that no ...
Página 721
... external forms of plants is of equal interest . That directive force which controls the different groupings of atoms in a molecule under the solid , liquid , or gaseous forms of matter , manifests itself in still more complicated ...
... external forms of plants is of equal interest . That directive force which controls the different groupings of atoms in a molecule under the solid , liquid , or gaseous forms of matter , manifests itself in still more complicated ...
Página 757
... Habits of Micropus melanoleucus , with Critical Notes on its Plumage and External Characters . Ext . Ibis , 1887. All from the author . GENERAL NOTES . GEOLOGY AND PALEONTOLOGY . On the Glacial 1887 ] 757 Recent Literature .
... Habits of Micropus melanoleucus , with Critical Notes on its Plumage and External Characters . Ext . Ibis , 1887. All from the author . GENERAL NOTES . GEOLOGY AND PALEONTOLOGY . On the Glacial 1887 ] 757 Recent Literature .
Página 770
... external form and internal structure . The ants were alive in the nest when I received it . They were chloroformed before sec- tioning the nest . I took from the nest about one - fourth pint of adults , pupæ , and larvæ . They were ...
... external form and internal structure . The ants were alive in the nest when I received it . They were chloroformed before sec- tioning the nest . I took from the nest about one - fourth pint of adults , pupæ , and larvæ . They were ...
Página 776
... external forces should be sufficient to change by slow degrees one such organism into another of a different species is untenable . The doctrine of chances alone shows it to be impossible . There is , moreover , the unanswerable ...
... external forces should be sufficient to change by slow degrees one such organism into another of a different species is untenable . The doctrine of chances alone shows it to be impossible . There is , moreover , the unanswerable ...
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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