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 2
... attached to the leaves of Lemna , along with various fresh - water Infusoria ; and of which he had in 1703 communicated a notice to the Royal Society of London . || The close relation of the Hydra with the marine polypes was now ...
... attached to the leaves of Lemna , along with various fresh - water Infusoria ; and of which he had in 1703 communicated a notice to the Royal Society of London . || The close relation of the Hydra with the marine polypes was now ...
Página 10
... attached to the ininvertible portion , and acting as an operculum in the retracted state . Polypide completely retractile ; evagination perfect ; orifice of the cell with a moveable lip . } SUB - ORDERS . LOPHOPEA ( fresh - water ) ...
... attached to the ininvertible portion , and acting as an operculum in the retracted state . Polypide completely retractile ; evagination perfect ; orifice of the cell with a moveable lip . } SUB - ORDERS . LOPHOPEA ( fresh - water ) ...
Página 11
... attached round the base of the tentacular crown . During the exsertion of the polypide , the invaginated portion of the endocyst is carried out with the latter , thus undergoing a process of evertion , which , however , in all the fresh ...
... attached round the base of the tentacular crown . During the exsertion of the polypide , the invaginated portion of the endocyst is carried out with the latter , thus undergoing a process of evertion , which , however , in all the fresh ...
Página 12
... attached to the cell - wall . For reasons to be presently mentioned , it is highly probable that the endocyst is pervaded by a system of canals of extreme delicacy , which constitute an irregular network in its substance . Besides the ...
... attached to the cell - wall . For reasons to be presently mentioned , it is highly probable that the endocyst is pervaded by a system of canals of extreme delicacy , which constitute an irregular network in its substance . Besides the ...
Página 14
... attached is carried inwards during extreme retraction of the polypide . These ribs I look upon as the true homologue of the selee which crown the cell in Bowerbankia and other ctenostomatous Polyzoa ; if these setć were reduced in ...
... attached is carried inwards during extreme retraction of the polypide . These ribs I look upon as the true homologue of the selee which crown the cell in Bowerbankia and other ctenostomatous Polyzoa ; if these setć were reduced in ...
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
action adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella described detected disc distinct Dumortier ectocyst edit endocyst entire epistome examined existence extending external extremity fibres fluid Fredericella fresh-water Polyzoa genera genus Gervais gives Hancock Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organ orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens resemblance retraction retractor Rösel seen separated sheath side space species specimens statoblasts stomach stones structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young