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 5
... Ascidian or the mantle of an ordinary Mollusc , a comparison which plainly shows that he had no idea whatever of the relation in question . The date is + ' Zoological Researches and Illustrations . ' By John V. Thompson . Cork , 1830 ...
... Ascidian or the mantle of an ordinary Mollusc , a comparison which plainly shows that he had no idea whatever of the relation in question . The date is + ' Zoological Researches and Illustrations . ' By John V. Thompson . Cork , 1830 ...
Página 6
... ascidian type of structure had now been recognised in the Polyzoa , naturalists had not yet emancipated themselves ... Ascidians by Edwards and Thompson . 7. The designation , by a common independent name , of these animals by Thompson ...
... ascidian type of structure had now been recognised in the Polyzoa , naturalists had not yet emancipated themselves ... Ascidians by Edwards and Thompson . 7. The designation , by a common independent name , of these animals by Thompson ...
Página 9
... Ascidian which contains the heart , the " hćmal . " Tabular view of the Orders and Sub - orders of Polyzoa . The reader will be further assisted in the anatomical inquiry in which we are now about to be engaged , by having placed before ...
... Ascidian which contains the heart , the " hćmal . " Tabular view of the Orders and Sub - orders of Polyzoa . The reader will be further assisted in the anatomical inquiry in which we are now about to be engaged , by having placed before ...
Página 43
... Ascidian has its representative in the pharynx of the Polyzoon , and that the rudimentary tentacula at the orifice of this sac are homologous with the tentacula of the Polyzoon . Under the other head it is asserted that the respiratory ...
... Ascidian has its representative in the pharynx of the Polyzoon , and that the rudimentary tentacula at the orifice of this sac are homologous with the tentacula of the Polyzoon . Under the other head it is asserted that the respiratory ...
Página 44
... Ascidian must be considered as becoming extinct in the tentacular crown of the Polyzoon . Now this view is certainly untenable . I have in another place endeavoured to show that while the respiratory sac of the Ascidian has undoubtedly ...
... Ascidian must be considered as becoming extinct in the tentacular crown of the Polyzoon . Now this view is certainly untenable . I have in another place endeavoured to show that while the respiratory sac of the Ascidian has undoubtedly ...
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