The Edinburgh New Philosophical Journal: Exhibiting a View of the Progressive Discoveries and Improvements in the Sciences and the Arts, 11. köideA. and C. Black, 1860 |
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Page 2
... least , of these peculiarities can no longer be maintained as constant characters . Quatre- fages states that he has seen segmentation take place , inde- pendently of impregnation , in the ova of Hermella and Unio , though no farther ...
... least , of these peculiarities can no longer be maintained as constant characters . Quatre- fages states that he has seen segmentation take place , inde- pendently of impregnation , in the ova of Hermella and Unio , though no farther ...
Page 4
... least , we find that in the lowest forms there may be a very prolonged pullulation of gemmæ , the sexual act recurring only at distant intervals , and in some cases not being as yet positively known to occur at all ; while in the higher ...
... least , we find that in the lowest forms there may be a very prolonged pullulation of gemmæ , the sexual act recurring only at distant intervals , and in some cases not being as yet positively known to occur at all ; while in the higher ...
Page 5
... least give origin , mediately or immediately , to others which do so . These two kinds of zooids , however , though differing so widely in their relations and structure - in the one case the primary products of impregnation , the ...
... least give origin , mediately or immediately , to others which do so . These two kinds of zooids , however , though differing so widely in their relations and structure - in the one case the primary products of impregnation , the ...
Page 18
... least in Alcyonella- it occupies exactly the position in certain cells that the buds destined to become polypides [ polypes ] do in others , and that , at an early stage of polypide and ovary , it is scarcely possible to distinguish one ...
... least in Alcyonella- it occupies exactly the position in certain cells that the buds destined to become polypides [ polypes ] do in others , and that , at an early stage of polypide and ovary , it is scarcely possible to distinguish one ...
Page 21
... least , as I can understand the translation of his paper in the Annals of Natural History " ( 2d series , vol . xx . , pp . 241 , 344 , 439 ) . 66 TABLE I. Table I. GENETIC CYCLE IN ANIMALS . PROTOMORPHIC STAGE . Genetic Cycle in ...
... least , as I can understand the translation of his paper in the Annals of Natural History " ( 2d series , vol . xx . , pp . 241 , 344 , 439 ) . 66 TABLE I. Table I. GENETIC CYCLE IN ANIMALS . PROTOMORPHIC STAGE . Genetic Cycle in ...
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acid ancient animals appearance arch Archegosaurus bones botany Bowfell caloric carbon carbonic acid caves cent Cestoidea character colour combustion contains distinct district draught Eastern Echinodermata Edinburgh effect embryogeny Europe exhibited existence fact feet flora formation fossils fuel gamomorphic gemmæ gemmation genera genus give glacial glaciers gneiss goitre Haurân hills hydrogen insects instance lake larvæ latter Lejah less light loss luminous mean temperature miles moraine mountains nature nearly Nitrogen North America observations occur organs origin orthomorphic ovum peculiar period phenomena plants portion present probably produced Professor protomorphic referred region remarkable resemblance roches moutonnées rock seen self-registering sepals SERIES.-VOL side Silurian similar skull Society species specific gravity specific heat specimens streamers structure surface Table tarn Taxodium thermometer tion trees Trematoda valley vegetable vertebræ weight Wellingtonia western whole zooids