A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 6-10 de 29
Página 21
... whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres , which may be seen extend- ing from the upper part of the pharynx to the base of ...
... whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres , which may be seen extend- ing from the upper part of the pharynx to the base of ...
Página 22
... whole mass of the generative system , is the nervous ganglion , close to which , and lying between it and the oesophagus , is a peculiar organ in the form of a minute tubular cavity clothed with actively vibrating cilia . I was unable ...
... whole mass of the generative system , is the nervous ganglion , close to which , and lying between it and the oesophagus , is a peculiar organ in the form of a minute tubular cavity clothed with actively vibrating cilia . I was unable ...
Página 24
... whole alimentary canal with the tentacular crown , so as to place them in a state of security in the interior of the conccium . * Quelques Observations sur les Polypes d'eau douce , loc . cit . ( 2. ) Rotatory Muscles of the Crown ...
... whole alimentary canal with the tentacular crown , so as to place them in a state of security in the interior of the conccium . * Quelques Observations sur les Polypes d'eau douce , loc . cit . ( 2. ) Rotatory Muscles of the Crown ...
Página 27
... whole endocyst . By their action they evidently constrict the endocyst in a transverse direction , and thus aid in the protrusion of the polypide . A muscular tissue is also very evident in the walls of the stomach ; this has already ...
... whole endocyst . By their action they evidently constrict the endocyst in a transverse direction , and thus aid in the protrusion of the polypide . A muscular tissue is also very evident in the walls of the stomach ; this has already ...
Página 30
... whole extent of the retractor muscle while the fibres were on the stretch in the exserted condition of the polypide ; and in all the other genera which I have had an opportunity of examining it has , under favorable circumstances of ...
... whole extent of the retractor muscle while the fibres were on the stretch in the exserted condition of the polypide ; and in all the other genera which I have had an opportunity of examining it has , under favorable circumstances of ...
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