On the Structure and Affinities of the "Tabulate Corals" of the Palaeozoic Period: With Critical Descriptions of Illustrative SpeciesWilliam Blackwood, 1879 - 342 páginas |
No interior do livro
Resultados 1-5 de 51
Página ix
... examination . * The work here referred to appeared , I believe , in 1877. With regard to its publication , Professor C. A. White states ( Bibliography of N. Amer . , Invert . Pal . , p . 38 , 1878 ) that he had been unable to consult a ...
... examination . * The work here referred to appeared , I believe , in 1877. With regard to its publication , Professor C. A. White states ( Bibliography of N. Amer . , Invert . Pal . , p . 38 , 1878 ) that he had been unable to consult a ...
Página 36
... examination of the above list shows that of the twenty- two genera placed in the Favositida no less than twenty are Paleozoic ; so that this group of Perforate Corals enjoyed , therefore , a great extension at this early period ...
... examination of the above list shows that of the twenty- two genera placed in the Favositida no less than twenty are Paleozoic ; so that this group of Perforate Corals enjoyed , therefore , a great extension at this early period ...
Página 39
... examination . Very commonly in calca- reous specimens , and sometimes in those which are silicified ( especially in those where the silica has assumed the " orbicu- lar " form ) , the walls of the corallites appear to be completely ...
... examination . Very commonly in calca- reous specimens , and sometimes in those which are silicified ( especially in those where the silica has assumed the " orbicu- lar " form ) , the walls of the corallites appear to be completely ...
Página 44
... examination of microscopic sections . Moreover , this transitional form some- times loses the characteristic of possessing a series of large corallites interspersed among numerous smaller ones , and passes by insensible gradations into ...
... examination of microscopic sections . Moreover , this transitional form some- times loses the characteristic of possessing a series of large corallites interspersed among numerous smaller ones , and passes by insensible gradations into ...
Página 46
... my determination has been founded upon an examination of actual specimens derived from the same formation as that which yielded examples to the author quoted . half line in diameter , sometimes less , and often 46 TABULATE CORALS .
... my determination has been founded upon an examination of actual specimens derived from the same formation as that which yielded examples to the author quoted . half line in diameter , sometimes less , and often 46 TABULATE CORALS .
Outras edições - Ver tudo
On the Structure and Affinities of the "Tabulate Corals" of the Palaeozoic ... Henry Alleyne Nicholson Visualização integral - 1879 |
On the Structure and Affinities of the "Tabulate Corals" of the Palaeozoic ... Henry Alleyne Nicholson Visualização integral - 1879 |
On the Structure and Affinities of the "Tabulate Corals" of the Palaeozoic ... Henry Alleyne Nicholson Visualização integral - 1879 |
Palavras e frases frequentes
Actinozoa affinities Alcyonaria allied alveolata Alveolites appear Aulopora Beaumontia Billings Brit calices Carboniferous Char.-Corallum characters Chatetes Chonostegites cœnenchyma Columnaria Constellaria contiguous corallites contiguous tubes coral corallum D'Orb Devonian distinct Dr Lindström Dr Rominger Edwards and Haime Eifel enlarged five enlarged twenty epitheca Favosites Favositida Fistulipora Forbesi Foss genus Goldf Goldfuss Gothlandica Halysites Heliolites Heliolitida horizontal Hydrozoa interstitial Labechia lamellæ large corallites large tubes larger latter line in diameter longitudinal Lonsd M'Coy Michelinia microscopic Milne-Edwards and Haime Monticulipora mural pores numerous Ontario Pachypora perforated polygonal Polyzoa pora Portion present prismatic radiating recognised regarded resemblance ridges sclerenchyma sections Pl separated septa small corallites small tubes smaller species specimens spines spiniform Stenopora Syringopora tabulæ Tabulata Tabulate Corals tangential section Tetradium Thecia thickened thin sections tissue transverse section Upper Silurian upper surface vertical section visceral chamber walls Wenlock Wenlock Limestone Zoantharia