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 31
... passes across the lophophore to unite with the corresponding chord of the opposite side . The tentacular filaments are directed towards the intervals between the tentacula . The ganglion also sends off a filament ( y ) , which dives ...
... passes across the lophophore to unite with the corresponding chord of the opposite side . The tentacular filaments are directed towards the intervals between the tentacula . The ganglion also sends off a filament ( y ) , which dives ...
Página 37
... passing off from the base of the lophophore , and the funiculus may also be seen attached to the posterior extremity of the body . The tentacula now make their appearance as minute tubercles upon the thickened margin of the lophophore ...
... passing off from the base of the lophophore , and the funiculus may also be seen attached to the posterior extremity of the body . The tentacula now make their appearance as minute tubercles upon the thickened margin of the lophophore ...
Página 38
... pass outwards over the annulus , and project in short rays beyond the mar- gin . The disc in all the species is of a deep brown colour , and would seem to be composed of a single layer of hexagonal cells , whose external walls in most ...
... pass outwards over the annulus , and project in short rays beyond the mar- gin . The disc in all the species is of a deep brown colour , and would seem to be composed of a single layer of hexagonal cells , whose external walls in most ...
Página 44
... passing transversely between these two sinuses , re- ceiving the blood from one and pouring it into the other . In advocating the homology of the respiratory sac of the Ascidian with the tentacular crown of the Polyzoon , some ...
... passing transversely between these two sinuses , re- ceiving the blood from one and pouring it into the other . In advocating the homology of the respiratory sac of the Ascidian with the tentacular crown of the Polyzoon , some ...
Página 45
... pass off at either side from this sinus , and are richly ciliated , will correspond to the ciliated tentacula of the Polyzoon ; the delicate membrane which constitutes the proper walls of the respiratory sac , to the interior of which ...
... pass off at either side from this sinus , and are richly ciliated , will correspond to the ciliated tentacula of the Polyzoon ; the delicate membrane which constitutes the proper walls of the respiratory sac , to the interior of which ...
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