A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 8
The cœnocium is composed almost universally of two perfectly distinct tunics ; to the external I have given the name of Ectocyst , ‡ and to the internal that of Endocyst . The sort of disc or stage which surrounds the mouth and bears ...
The cœnocium is composed almost universally of two perfectly distinct tunics ; to the external I have given the name of Ectocyst , ‡ and to the internal that of Endocyst . The sort of disc or stage which surrounds the mouth and bears ...
Página 11
The cœnocium , in every case , except in Cristatella , is composed of two distinct membranes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft , transparent , and contractile ...
The cœnocium , in every case , except in Cristatella , is composed of two distinct membranes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft , transparent , and contractile ...
Página 17
Internally is a yellowish - brown layer ( Pl . III , fig . 7 x ) , which is thrown into large longitudinal rugæ . These rugæ become less decided towards the fundus of the stomach , and in Paludicella they are entirely absent .
Internally is a yellowish - brown layer ( Pl . III , fig . 7 x ) , which is thrown into large longitudinal rugæ . These rugæ become less decided towards the fundus of the stomach , and in Paludicella they are entirely absent .
Página 18
The fundus of the stomach appears to differ from the rest of the alimentary canal in structure and function ; the well - defined longitudinal rugæ and deep brown colour of the internal layer of the stomach nearly disappear in it ...
The fundus of the stomach appears to differ from the rest of the alimentary canal in structure and function ; the well - defined longitudinal rugæ and deep brown colour of the internal layer of the stomach nearly disappear in it ...
Página 20
The internal layer is a delicate transparent membrane , in which I could detect no trace of approximated at their extremities , and thus , instead of constituting an open crescent , they form a ring enclosing a space which embraces ...
The internal layer is a delicate transparent membrane , in which I could detect no trace of approximated at their extremities , and thus , instead of constituting an open crescent , they form a ring enclosing a space which embraces ...
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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
action adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British 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 Hancock Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organ 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 stones 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 |