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 16
... walls which are turned towards the mouth are thick , and densely clothed on their external surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may ...
... walls which are turned towards the mouth are thick , and densely clothed on their external surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may ...
Página 18
... 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 layers ( Pl ...
... 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 layers ( Pl ...
Página 19
... walls of the perigastric space would seem , among the Polyzoa , chiefly to devolve the function of bringing under the influence of the aërating medium the nutritious fluid of their tissues . The tentacular crown of a Polyzoon consists ...
... walls of the perigastric space would seem , among the Polyzoa , chiefly to devolve the function of bringing under the influence of the aërating medium the nutritious fluid of their tissues . The tentacular crown of a Polyzoon consists ...
Página 21
... walls of the tubular cavity . Nervous filaments , and certain bands , probably mus- cular , to be presently described , may be traced as far as the root of each tentacle , and doubtless also enter into its structure . In Cristatella , a ...
... walls of the tubular cavity . Nervous filaments , and certain bands , probably mus- cular , to be presently described , may be traced as far as the root of each tentacle , and doubtless also enter into its structure . In Cristatella , a ...
Página 22
... walls of the cell of Polyzoa . I was Between the œsophagus and rectum , but separated from the latter by the whole mass of the generative system , is the nervous ganglion , close to which , and lying between it and the œsophagus , is a ...
... walls of the cell of Polyzoa . I was Between the œsophagus and rectum , but separated from the latter by the whole mass of the generative system , is the nervous ganglion , close to which , and lying between it and the œsophagus , is a ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus 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