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 7
... stomach , and intestine , to be furnished at its origin with long ciliated tentacula , and to have a single nervous ganglion situated on one side of the oesophagus . Let us now suppose this canal to be bent back upon itself towards the ...
... stomach , and intestine , to be furnished at its origin with long ciliated tentacula , and to have a single nervous ganglion situated on one side of the oesophagus . Let us now suppose this canal to be bent back upon itself towards the ...
Página 13
... stomach with the walls of the cells . In the endocyst alone , however , do they appear to be contained in distinct canals . In Cristatella , where the endocyst constitutes the whole of the cœnocium , it presents below a flattened disc ...
... stomach with the walls of the cells . In the endocyst alone , however , do they appear to be contained in distinct canals . In Cristatella , where the endocyst constitutes the whole of the cœnocium , it presents below a flattened disc ...
Página 16
... stomach ; it becomes gradually narrower as it approaches the latter , into which it opens by a very distinct conical projection ( Pl . III , fig . 7 , ƒ ) . To the œsophagus immediately succeeds the stomach , without the intervention of ...
... stomach ; it becomes gradually narrower as it approaches the latter , into which it opens by a very distinct conical projection ( Pl . III , fig . 7 , ƒ ) . To the œsophagus immediately succeeds the stomach , without the intervention of ...
Página 17
... stomach in the other fresh - water Polyzoa , and to the gizzard in certain marine species . This sac is much more distinct from the great cavity of the stomach than in the other Polyzoa of fresh water . It enters this cavity near its ...
... stomach in the other fresh - water Polyzoa , and to the gizzard in certain marine species . This sac is much more distinct from the great cavity of the stomach than in the other Polyzoa of fresh water . It enters this cavity near its ...
Página 18
... stomach , the former being here largely developed ( A ' ) , while the internal or hepatic layer of the stomach is entirely absent , and there are no longitudinal ruga . The mouth and upper part of the œsophagus are in all the genera ...
... stomach , the former being here largely developed ( A ' ) , while the internal or hepatic layer of the stomach is entirely absent , and there are no longitudinal ruga . The mouth and upper part of the œsophagus are in all the genera ...
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