A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 1
... fungus - like masses , or hard , calcareous , branchy growths , like diminutive trees ; and now again presenting the appearance of the most delicate and exquisitely formed sea - weed or moss , offering , even to the unassisted eye ...
... fungus - like masses , or hard , calcareous , branchy growths , like diminutive trees ; and now again presenting the appearance of the most delicate and exquisitely formed sea - weed or moss , offering , even to the unassisted eye ...
Página 3
It consisted of a lobed jelly - like mass , from which protruded numerous polypoid bodies , each characterised by the possession of an elegant crown of tentacula borne on the margin of a crescent - shaped disc .
It consisted of a lobed jelly - like mass , from which protruded numerous polypoid bodies , each characterised by the possession of an elegant crown of tentacula borne on the margin of a crescent - shaped disc .
Página 12
The first thing observed is the accumulation round the nucleus of a little mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the ...
The first thing observed is the accumulation round the nucleus of a little mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the ...
Página 14
The structure of this body is remarkable ; it consists of a central mass , surrounded by a distinct layer of somewhat elongated cellules placed perpendicularly to its surface . The body which thus closes up the centre of the annular ...
The structure of this body is remarkable ; it consists of a central mass , surrounded by a distinct layer of somewhat elongated cellules placed perpendicularly to its surface . The body which thus closes up the centre of the annular ...
Página 18
... seizes a portion of the alimentary mass , and retains it for a moment by an hour - glass restriction separate from the remainder , and then powerfully contracting on it , forces it back among the other contents of the stomach .
... seizes a portion of the alimentary mass , and retains it for a moment by an hour - glass restriction separate from the remainder , and then powerfully contracting on it , forces it back among the other contents of the stomach .
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A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
A Monograph of the Fresh-Water Polyzoa, Including All the Known Species ... George James Allman Sin vista previa disponible - 2009 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cćnćcium canal cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella described detected disc distinct Dumortier ectocyst edit endocyst entire epistome examined existence extending external extremity fibres fluid Fredericella fresh-water Polyzoa genera genus Gervais gives Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organs orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens resemblance retraction retractor Rösel seen separated sheath side space species specimens statoblasts stomach structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young
Información bibliográfica
| Título | A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign Volumen18 de ¬The Ray Society |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
| Largo | 119 páginas |
| Exportar cita | BiBTeX EndNote RefMan |