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 21
... tentacle is rolled inwards as far as the margin of the calyx - like cup , and then the mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly ...
... tentacle is rolled inwards as far as the margin of the calyx - like cup , and then the mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly ...
Página 23
... tentacular crown , were long ago observed by Trembley in Lophopus crystallinus ; but this author con- tented himself with simply recording their existence , and made no attempt to explain them . Nordmann , who observed them both in ...
... tentacular crown , were long ago observed by Trembley in Lophopus crystallinus ; but this author con- tented himself with simply recording their existence , and made no attempt to explain them . Nordmann , who observed them both in ...
Página 24
... tentacular sheath in certain species during the exserted state of the polypide ( Pl . IV , fig . 4 ) ; on other ... crown , so as to place them in a state of security in the interior of the conccium . * Quelques Observations sur les Polypes d ...
... tentacular sheath in certain species during the exserted state of the polypide ( Pl . IV , fig . 4 ) ; on other ... crown , so as to place them in a state of security in the interior of the conccium . * Quelques Observations sur les Polypes d ...
Página 25
... crown , and thence pass outwards to the right and left , to be inserted each into its own side of the lophophore . Action : they rotate the tentacular crown , and depress the lobes . ( 3. ) Tentacular Muscles ? Under this name may ...
... crown , and thence pass outwards to the right and left , to be inserted each into its own side of the lophophore . Action : they rotate the tentacular crown , and depress the lobes . ( 3. ) Tentacular Muscles ? Under this name may ...
Página 29
... tentacular sheath , continues to be carried outwards by the advancing ... tentacular sheath . It may be witnessed during the act of protrusion in Plumatella ... crown and the excitement of the vortices in the surrounding fluid , by the ...
... tentacular sheath , continues to be carried outwards by the advancing ... tentacular sheath . It may be witnessed during the act of protrusion in Plumatella ... crown and the excitement of the vortices in the surrounding fluid , by the ...
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