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 15
... circular disc ; and twelve internal , radiating , fleshy lamellæ show through the disc . Thus they closely resemble the polypes of Stylo- phora , Porites , and Madrepora , which are among the most typical of the true polypes . The ...
... circular disc ; and twelve internal , radiating , fleshy lamellæ show through the disc . Thus they closely resemble the polypes of Stylo- phora , Porites , and Madrepora , which are among the most typical of the true polypes . The ...
Página 37
... circular " mural pores , " by which the separate corallites are placed in communication . Visceral chamber in- tersected by a greater or less number of complete or incom- plete transverse partitions or " tabulæ . " Septa obsolete , or ...
... circular " mural pores , " by which the separate corallites are placed in communication . Visceral chamber in- tersected by a greater or less number of complete or incom- plete transverse partitions or " tabulæ . " Septa obsolete , or ...
Página 38
... circular apertures or " mural pores . " These fora- mina are usually arranged in a regular manner ; and though this arrangement is not absolutely constant for , perhaps , any given species , still it is approximately uniform in its ...
... circular apertures or " mural pores . " These fora- mina are usually arranged in a regular manner ; and though this arrangement is not absolutely constant for , perhaps , any given species , still it is approximately uniform in its ...
Página 39
... circular pit , or the surface may be quite plane . It should , lastly , be noticed in this connection , that the mural pores are commonly very difficult of detection , even in specimens otherwise perfectly well preserved , by even the ...
... circular pit , or the surface may be quite plane . It should , lastly , be noticed in this connection , that the mural pores are commonly very difficult of detection , even in specimens otherwise perfectly well preserved , by even the ...
Página 59
... circular outline . As regards the internal structure of this form there is little of importance to note . The presence of septa in the form of short spines , vertical striæ , or tubercular ridges , can usually be made out by ex- amining ...
... circular outline . As regards the internal structure of this form there is little of importance to note . The presence of septa in the form of short spines , vertical striæ , or tubercular ridges , can usually be made out by ex- amining ...
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