A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Resultados 1-5 de 22
Página 11
... action of acetic acid each is distinctly seen to be bounded by a double outline , and to contain a large nucleus with nucleolus ( Pl . II , fig . 9 ) ; the nucleus , with its nucleolus , are imbedded in the walls of the cell . The ...
... action of acetic acid each is distinctly seen to be bounded by a double outline , and to contain a large nucleus with nucleolus ( Pl . II , fig . 9 ) ; the nucleus , with its nucleolus , are imbedded in the walls of the cell . The ...
Página 12
... action . The first thing observed is the accumulation round the nucleus of a little mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size ...
... action . The first thing observed is the accumulation round the nucleus of a little mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size ...
Página 13
... action of acetic acid dilates and fills nearly the entire corpuscle ( fig . 15 ) . The situation of these bodies in a tubular network in the substance of the endocyst is a fact of great interest . It is nearly certain that whatever may ...
... action of acetic acid dilates and fills nearly the entire corpuscle ( fig . 15 ) . The situation of these bodies in a tubular network in the substance of the endocyst is a fact of great interest . It is nearly certain that whatever may ...
Página 18
... action of the walls is more marked in it than in any other part of the gastric cavity , while it is every now and then separated from the rest of this cavity by a momentary hour - glass constriction . In the œsophagus there are only two ...
... action of the walls is more marked in it than in any other part of the gastric cavity , while it is every now and then separated from the rest of this cavity by a momentary hour - glass constriction . In the œsophagus there are only two ...
Página 21
... 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 the cell ...
... 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 the cell ...
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