On the Structure and Affinities of the "Tabulate Corals" of the Palaeozoic Period: With Critical Descriptions of Illustrative SpeciesWilliam Blackwood, 1879 - 342 páginas |
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Página 16
... rounded apertures - the " mural pores " ( fig . 4 , B ) -by which the visceral chambers of contiguous polypes are placed in direct communication . There is no true cœnen- chyma ; and the condition of the septa is extremely variable ...
... rounded apertures - the " mural pores " ( fig . 4 , B ) -by which the visceral chambers of contiguous polypes are placed in direct communication . There is no true cœnen- chyma ; and the condition of the septa is extremely variable ...
Página 50
... rounded character of those of F. For- besi , nor is there the same conspicuous interpolation of small tubes among the larger ones . All the forms which I have here included under F. Gothlandica agree in the possession of these regularly ...
... rounded character of those of F. For- besi , nor is there the same conspicuous interpolation of small tubes among the larger ones . All the forms which I have here included under F. Gothlandica agree in the possession of these regularly ...
Página 55
... rounded , while there are only three or four tabulæ in the space of two lines . After examining excellently preserved examples from Canada , I am unable to regard this as more than a varietal form of F. Gothlandica . Lastly , the name ...
... rounded , while there are only three or four tabulæ in the space of two lines . After examining excellently preserved examples from Canada , I am unable to regard this as more than a varietal form of F. Gothlandica . Lastly , the name ...
Página 61
... rounded angles , and more uniform in size than in typical forms of the species , the larger ones being numerous , but mostly attaining a diameter of no more than a line or three - quarters of a line , while the small tubes are much ...
... rounded angles , and more uniform in size than in typical forms of the species , the larger ones being numerous , but mostly attaining a diameter of no more than a line or three - quarters of a line , while the small tubes are much ...
Página 63
... rounded , and varying from a line and a half to a line and three - quarters in diameter . The small tubes are intercalated in the spaces between the smaller ones , and are usually from a quarter to half a line in diameter . Calices ...
... rounded , and varying from a line and a half to a line and three - quarters in diameter . The small tubes are intercalated in the spaces between the smaller ones , and are usually from a quarter to half a line in diameter . Calices ...
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