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 29
... polypide , is scarcely at all bent , so that here its agency in exsertion is at once out of the question . Let us suppose the polypide withdrawn into the recesses of the cell , and that hunger or some other stimulus impresses on it a ...
... polypide , is scarcely at all bent , so that here its agency in exsertion is at once out of the question . Let us suppose the polypide withdrawn into the recesses of the cell , and that hunger or some other stimulus impresses on it a ...
Página 30
... 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 had been carried out during protrusion ; in the other genera ...
... 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 had been carried out during protrusion ; in the other genera ...
Página 32
... polypide , and the former portion may generally be seen with the undulating spermatozoa projecting from it on all sides , in the form of a dense villosity ( Pl . III , fig . 7 , x ) , while some of these , already become free ( E ) ...
... polypide , and the former portion may generally be seen with the undulating spermatozoa projecting from it on all sides , in the form of a dense villosity ( Pl . III , fig . 7 , x ) , while some of these , already become free ( E ) ...
Página 34
... polypide is developed ( Pl . XI , fig . 30 ) . This appears to take place in a manner quite similar to that by which new polypides are produced by gemmation from the walls of the endocystal cavity in the adult . The gemmation of the ...
... polypide is developed ( Pl . XI , fig . 30 ) . This appears to take place in a manner quite similar to that by which new polypides are produced by gemmation from the walls of the endocystal cavity in the adult . The gemmation of the ...
Página 35
... polypides , with their proper ectocysts and endocysts . Plumatella fruticosa presents similar developmental phenomena ; the ciliated larva , however , in this species , differs from that just described , in having its polypide single ...
... polypides , with their proper ectocysts and endocysts . Plumatella fruticosa presents similar developmental phenomena ; the ciliated larva , however , in this species , differs from that just described , in having its polypide single ...
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