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 36
... mass into the interior of the young cell ( fig . 4 ) . It is the rudimental polypide , and we soon find in it a cavity , which is to become that of the tentacular sheath , within which , when viewed in front , may be seen an oval ring ...
... mass into the interior of the young cell ( fig . 4 ) . It is the rudimental polypide , and we soon find in it a cavity , which is to become that of the tentacular sheath , within which , when viewed in front , may be seen an oval ring ...
Página 37
... mass of minute cells with a more condensed peripheral layer . It now increases in size , and a clear , oval space becomes apparent towards one side of it ( fig . 11 ) . This space soon acquires a triangular figure ( fig . 12 ) , and it ...
... mass of minute cells with a more condensed peripheral layer . It now increases in size , and a clear , oval space becomes apparent towards one side of it ( fig . 11 ) . This space soon acquires a triangular figure ( fig . 12 ) , and it ...
Página 38
... mass of minute cells , surrounded by a denser layer , which is continuous with the surface of the funiculus . The swelling now increases in size , and assumes a more regularly oval form , while its contents appear more uniformly ...
... mass of minute cells , surrounded by a denser layer , which is continuous with the surface of the funiculus . The swelling now increases in size , and assumes a more regularly oval form , while its contents appear more uniformly ...
Página 40
... masses appear to continue distinct , while in the Polyzoa they are subsequently fused into a single mass . The recent researches * Στατός , βλάστη . † ' Quarterly Journal of Microscopical Science , ' Oct. , 1852 . He of Mr. Lubbock ...
... masses appear to continue distinct , while in the Polyzoa they are subsequently fused into a single mass . The recent researches * Στατός , βλάστη . † ' Quarterly Journal of Microscopical Science , ' Oct. , 1852 . He of Mr. Lubbock ...
Página 41
... mass into two separate portions , which move off in opposite directions . In Lophopus the process is very similar ... masses . It is analogous to the gemmiparous reproduction of Hydra , and must not be confounded with the true ...
... mass into two separate portions , which move off in opposite directions . In Lophopus the process is very similar ... masses . It is analogous to the gemmiparous reproduction of Hydra , and must not be confounded with the true ...
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