A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Página 11
... Cristatella , is composed of two distinct mem- branes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft , transparent , and contractile ; and an external , the ectocyst , which ...
... Cristatella , is composed of two distinct mem- branes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft , transparent , and contractile ; and an external , the ectocyst , which ...
Página 13
... Cristatella , where the endocyst constitutes the whole of the cœnocium , it presents below a flattened disc , which ... Cristatella ( Pl . I ) the ectocyst would seem to be entirely absent ; and this genus . therefore , presents the ...
... Cristatella , where the endocyst constitutes the whole of the cœnocium , it presents below a flattened disc , which ... Cristatella ( Pl . I ) the ectocyst would seem to be entirely absent ; and this genus . therefore , presents the ...
Página 15
... Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ectocyst of the fresh - water Polyzoa appears in every case to be absolutely structure- less . The fact of ...
... Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ectocyst of the fresh - water Polyzoa appears in every case to be absolutely structure- less . The fact of ...
Página 18
... Cristatella , the cells of the internal layer corresponding to the middle layer of the stomach are large , and filled , in the well - fed animal , with a clear greenish - blue fluid . With the exception of the mouth and upper portion of ...
... Cristatella , the cells of the internal layer corresponding to the middle layer of the stomach are large , and filled , in the well - fed animal , with a clear greenish - blue fluid . With the exception of the mouth and upper portion of ...
Página 19
... Cristatella . ( 3. ) Organs of Respiration and Circulation . Upon the tentacular crown and the walls of the perigastric space would seem , among the Polyzoa , chiefly to devolve the function of bringing under the influence of the ...
... Cristatella . ( 3. ) Organs of Respiration and Circulation . Upon the tentacular crown and the walls of the perigastric space would seem , among the Polyzoa , chiefly to devolve the function of bringing under the influence of the ...
Otras ediciones - Ver todas
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 Alcyonella Alcyonella fungosa Alcyonella stagnorum alimentary canal Allman anatomy animal annulus Ascidian attached become Beneden Bowerbankia Brachiopoda branches branchial sac Brit Brux campanulata cavity cell cilia cœnocium crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst embryo endocyst epistome exserted external fibres flabellum fluid fresh-water Polyzoa funiculus ganglion genera genus Gervais hæmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnæus lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed œsophagus organ orifice Original figures ovary ovum Paludicella parieto-vaginal muscles peculiar Pedicellina perigastric space Plumatella repens Polype à Panache polypide Polyzoon portion posterior present Raspail respiratory retraction retractor retractor muscles Rösel seen septa side species specimens statoblasts stomach structure surface tentacles tentacula tentacular crown tentacular sheath thoracic chamber transparent transverse Trembley tubes Tubularia repens tunic Tunicata Urnatella walls Zooph Zoophytes