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 8
... cells are the little chambers of which the cœnocium is made up , and in each of which a polypide is lodged . The part of the cell through which the polypide admits of protrusion and retraction is the orifice of the cell . * Πολυποὺς ...
... cells are the little chambers of which the cœnocium is made up , and in each of which a polypide is lodged . The part of the cell through which the polypide admits of protrusion and retraction is the orifice of the cell . * Πολυποὺς ...
Página 10
... cell destitute of move- able appendage . Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the in- invertible portion , and act- ing as an operculum in the retracted state . Polypide completely ...
... cell destitute of move- able appendage . Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the in- invertible portion , and act- ing as an operculum in the retracted state . Polypide completely ...
Página 11
... cell , and again withdrawn into it , and the part through which it thus passes outwards and inwards , as has already been defined , is the orifice of the cell . It must not , however , be supposed that there is here any proper orifice ...
... cell , and again withdrawn into it , and the part through which it thus passes outwards and inwards , as has already been defined , is the orifice of the cell . It must not , however , be supposed that there is here any proper orifice ...
Página 12
... cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the cell - wall . For reasons to be presently mentioned , it is highly probable that the endocyst is pervaded by ...
... cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the cell - wall . For reasons to be presently mentioned , it is highly probable that the endocyst is pervaded by ...
Página 13
... cell , and gradually narrows as it passes backwards , when it soon assumes the appearance of a prominent keel , and then loses its transparency by the deposition of earthy matter , as in the rest of the ectocyst ( Pl . VIII , figs . 2 ...
... cell , and gradually narrows as it passes backwards , when it soon assumes the appearance of a prominent keel , and then loses its transparency by the deposition of earthy matter , as in the rest of the ectocyst ( Pl . VIII , figs . 2 ...
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