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 14
... septa are by no means so constant or complete as in Paludicella . In several species of Plumatella , especially P. coralloides ( Pl . VII , figs . 2 , 3 ) , septa exist , but these generally occur only at intervals , leaving several ...
... septa are by no means so constant or complete as in Paludicella . In several species of Plumatella , especially P. coralloides ( Pl . VII , figs . 2 , 3 ) , septa exist , but these generally occur only at intervals , leaving several ...
Página 15
... septa may here and there be observed , while 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 ...
... septa may here and there be observed , while 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 ...
Página 89
... septa may be seen at the origin of many of the branches . The tubes , towards the end of summer , are loaded with mature statoblasts , which , on the rupture of the cœnœcium , escape in great numbers into the surrounding water . The ...
... septa may be seen at the origin of many of the branches . The tubes , towards the end of summer , are loaded with mature statoblasts , which , on the rupture of the cœnœcium , escape in great numbers into the surrounding water . The ...
Página 92
... septa or diaphragms occur near the origin of certain cells when complete , separating the cavities of these cells from those of the neighbouring ones . They , however , are very frequently incomplete , admitting of a free communication ...
... septa or diaphragms occur near the origin of certain cells when complete , separating the cavities of these cells from those of the neighbouring ones . They , however , are very frequently incomplete , admitting of a free communication ...
Página 93
... septa would seem to occur generally throughout Alcyonella , Plumatella , and Fredericella , while in Paludicella these septa acquire their maximum in development and constancy , and become thus one of the most striking features of the ...
... septa would seem to occur generally throughout Alcyonella , Plumatella , and Fredericella , while in Paludicella these septa acquire their maximum in development and constancy , and become thus one of the most striking features 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