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 11
... 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 , the retraction and exsertion consisting merely in an invagination and ...
... 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 , the retraction and exsertion consisting merely in an invagination and ...
Página 12
... passes into the tentacular sheath , there appears to exist , at least in Lophopus , a circular canal , which here passes trans- versely round the endocyst . The presence of this canal is revealed by peculiar , spherical or oval ...
... passes into the tentacular sheath , there appears to exist , at least in Lophopus , a circular canal , which here passes trans- versely round the endocyst . The presence of this canal is revealed by peculiar , spherical or oval ...
Página 13
... 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 , 3 ) . The perfectly transparent ...
... 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 , 3 ) . The perfectly transparent ...
Página 17
... passes up along the side of the cardiac cavity and oesophagus , rapidly diminishing in diameter till it terminates in a distinct anus by perforating the tentacular sheath just below the mouth , and at the concave side of the lophophore ...
... passes up along the side of the cardiac cavity and oesophagus , rapidly diminishing in diameter till it terminates in a distinct anus by perforating the tentacular sheath just below the mouth , and at the concave side of the lophophore ...
Página 20
... passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus binding together the two tentacula which spring from the points of the arms , and completing the tentacular crater so as entirely to ...
... passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus binding together the two tentacula which spring from the points of the arms , and completing the tentacular crater so as entirely to ...
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