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 27
... endocyst , muscular fibres ( Pl . V , figs . 5 , 6 , v ) were mentioned as entering into the composition of this ... endocyst . By their action they evidently constrict the endocyst in a transverse direction , and thus aid in the ...
... endocyst , muscular fibres ( Pl . V , figs . 5 , 6 , v ) were mentioned as entering into the composition of this ... endocyst . By their action they evidently constrict the endocyst in a transverse direction , and thus aid in the ...
Página 28
... endocyst after the retraction of the polypide . ( 5. ) Parietal Muscles . These are numerous , short but strong , and very evident fibres ( Pl . X , figs . 3 , 4 , v ) , which run transversely in the endocyst in small groups of two or ...
... endocyst after the retraction of the polypide . ( 5. ) Parietal Muscles . These are numerous , short but strong , and very evident fibres ( Pl . X , figs . 3 , 4 , v ) , which run transversely in the endocyst in small groups of two or ...
Página 29
... endocyst now contracts on the perigastric fluid , which , pressing on the polypide , forces it onwards towards the orifice ; at the same time the vaginal sphincter relaxing , affords to the cone of tentacula a free passage through the ...
... endocyst now contracts on the perigastric fluid , which , pressing on the polypide , forces it onwards towards the orifice ; at the same time the vaginal sphincter relaxing , affords to the cone of tentacula a free passage through the ...
Página 30
... endocyst , the great retractor muscles act directly on the polypide and withdraw it into the cell , the anterior and posterior parieto- vaginal muscles in Paludicella drawing after it as it descends that portion of the endocyst which ...
... endocyst , the great retractor muscles act directly on the polypide and withdraw it into the cell , the anterior and posterior parieto- vaginal muscles in Paludicella drawing after it as it descends that portion of the endocyst which ...
Página 32
... endocyst at a little distance within the orifice , and corresponding exactly in position to an ordinary bud , with the early stage of which it may indeed be readily confounded . This body is the ovary . It is filled with spherical ova ...
... endocyst at a little distance within the orifice , and corresponding exactly in position to an ordinary bud , with the early stage of which it may indeed be readily confounded . This body is the ovary . It is filled with spherical ova ...
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