A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 1-5 de 58
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... portion of the volume has thus been rendered as complete as possible for the practical identification of the species . In fixing the exact limits of the species , some difficulty has been experienced . I have however , deemed it best to ...
... portion of the volume has thus been rendered as complete as possible for the practical identification of the species . In fixing the exact limits of the species , some difficulty has been experienced . I have however , deemed it best to ...
Página 7
... portion of the interior of the sac , and the negative character of the absence of all vestige of a heart , we shall have perhaps as correct an idea - apart from all theoretical considerations of homology or derivation from an archetype ...
... portion of the interior of the sac , and the negative character of the absence of all vestige of a heart , we shall have perhaps as correct an idea - apart from all theoretical considerations of homology or derivation from an archetype ...
Página 8
... portion of the Polyzoa , I have substituted in the following memoir that of Polypide . * To the common dermal system of a colony , which , as well as the solid basis of the true polypes , was formerly known under the names of Polypary ...
... portion of the Polyzoa , I have substituted in the following memoir that of Polypide . * To the common dermal system of a colony , which , as well as the solid basis of the true polypes , was formerly known under the names of Polypary ...
Página 9
... portion of an animal totally deprived of a blood - vascular system , I shall call that region of a Polyzoon on which the nervous ganglion lies the " neural , " and the opposite region , that , namely , which corresponds to the part of ...
... portion of an animal totally deprived of a blood - vascular system , I shall call that region of a Polyzoon on which the nervous ganglion lies the " neural , " and the opposite region , that , namely , which corresponds to the part of ...
Página 10
... 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 ) . PEDICELLINEA ‡ ( marine ) ...
... 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 ) . PEDICELLINEA ‡ ( marine ) ...
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