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 30
... discs may be recognised in the detached and broken fibre . Indications of a very delicate investing sarcolema may also be occasionally witnessed . also be occasionally witnessed . When the fibre is in an uncontracted state , it would ...
... discs may be recognised in the detached and broken fibre . Indications of a very delicate investing sarcolema may also be occasionally witnessed . also be occasionally witnessed . When the fibre is in an uncontracted state , it would ...
Página 35
... disc . In Paludicella they also arise with much regularity from fixed points a little below and at each side of the orifice of the previously formed cells ; and here , not continuing in apposition , the new cells form branches , which ...
... disc . In Paludicella they also arise with much regularity from fixed points a little below and at each side of the orifice of the previously formed cells ; and here , not continuing in apposition , the new cells form branches , which ...
Página 37
... discs united by their margins , where they are further strengthened by a ring which runs round the entire margin , and is of a different structure from the disc ( Pl . I , figs . 3—8 ; Pl . IV , figs . 4 , 5 ; & c . ) In Fredericella ...
... discs united by their margins , where they are further strengthened by a ring which runs round the entire margin , and is of a different structure from the disc ( Pl . I , figs . 3—8 ; Pl . IV , figs . 4 , 5 ; & c . ) In Fredericella ...
Página 38
... discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are also for the most part larger than those of the disc and of a different colour ; they are filled with air , giving to ...
... discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are also for the most part larger than those of the disc and of a different colour ; they are filled with air , giving to ...
Página 40
... disc ( Pl . IV , figs . 7—9 ; VII , figs . 7 , 8 ) . But , besides these bodies , others ( Pl . IV , fig . 10 ; VII , fig . 9 ) may be observed which never lie loose in the cell , but are invariably attached to the internal surface of ...
... disc ( Pl . IV , figs . 7—9 ; VII , figs . 7 , 8 ) . But , besides these bodies , others ( Pl . IV , fig . 10 ; VII , fig . 9 ) may be observed which never lie loose in the cell , but are invariably attached to the internal surface of ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus 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