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
... retraction of the polypide . These ribs I look upon as the true homologue of the seta which crown the cell in Bowerbankia and other ctenostomatous Polyzoa ; if these setæ were reduced in number to four , and instead of being free were ...
... retraction of the polypide . These ribs I look upon as the true homologue of the seta which crown the cell in Bowerbankia and other ctenostomatous Polyzoa ; if these setæ were reduced in number to four , and instead of being free were ...
Página 17
... retraction of the polypide it is bent back upon the rest of the stomach . The great cavity ( g ) of the stomach is of a nearly cylindrical figure ; from its upper extremity arises the intestine ( ) . This tube presents , just after its ...
... retraction of the polypide it is bent back upon the rest of the stomach . The great cavity ( g ) of the stomach is of a nearly cylindrical figure ; from its upper extremity arises the intestine ( ) . This tube presents , just after its ...
Página 21
... retracted ; the invaginated portion of the endocyst must then be viewed as adherent to the external portion externally , and to the tentacula ( and calyx ? ) internally . From this arrangement it is obvious , that the exsertion and ...
... retracted ; the invaginated portion of the endocyst must then be viewed as adherent to the external portion externally , and to the tentacula ( and calyx ? ) internally . From this arrangement it is obvious , that the exsertion and ...
Página 24
... retract the whole alimentary canal with the tentacular crown , so as to place them in a state of security in the interior of the cœnocium . * Quelques Observations sur les Polypes d'eau douce , loc . cit . ( 2. ) Rotatory Muscles of the ...
... retract the whole alimentary canal with the tentacular crown , so as to place them in a state of security in the interior of the cœnocium . * Quelques Observations sur les Polypes d'eau douce , loc . cit . ( 2. ) Rotatory Muscles of the ...
Página 26
... retracted , yet the demonstration of an actual muscle is by no means easy . I have , however , convinced myself of the existence of a distinct structure at the place where the contraction occurs , and , though the presence of fibres is ...
... retracted , yet the demonstration of an actual muscle is by no means easy . I have , however , convinced myself of the existence of a distinct structure at the place where the contraction occurs , and , though the presence of fibres is ...
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