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
... and contractile ; and an external , the ectocyst , which varies greatly in character in the different genera . ... and when it arrives at their apertures would protrude beyond the ectocyst were it not that it here becomes ...
... and contractile ; and an external , the ectocyst , which varies greatly in character in the different genera . ... and when it arrives at their apertures would protrude beyond the ectocyst were it not that it here becomes ...
Página 12
In Paludicella , whose transparent ectocyst admits of a distinct view of all the contained parts , the fibres are collected into numerous transverse bands ( Pl . X , figs . 3 , 4 , v ) , which we may trace throughout the whole extent of ...
In Paludicella , whose transparent ectocyst admits of a distinct view of all the contained parts , the fibres are collected into numerous transverse bands ( Pl . X , figs . 3 , 4 , v ) , which we may trace throughout the whole extent of ...
Página 13
The ectocyst or external investment ( Pl . III , fig . 7 ; V , figs . 5 , 6 ; IX , fig . 7 ; X , fig . 4 , a ) is , in most of the species , composed of a tough pregamentaceous brown membrane , strengthened by the deposition ...
The ectocyst or external investment ( Pl . III , fig . 7 ; V , figs . 5 , 6 ; IX , fig . 7 ; X , fig . 4 , a ) is , in most of the species , composed of a tough pregamentaceous brown membrane , strengthened by the deposition ...
Página 14
Lophopus , also , at first sight , conveys the impression of being destitute of an ectocyst , and having the place of this tunic supplied by a peculiar unorganized gelatinoid secretion , in which the colony is enveloped ( Pl . II ...
Lophopus , also , at first sight , conveys the impression of being destitute of an ectocyst , and having the place of this tunic supplied by a peculiar unorganized gelatinoid secretion , in which the colony is enveloped ( Pl . II ...
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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 |
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