A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Resultados 6-10 de 33
Página 21
... margin of the calyx - like cup , and then the mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres ...
... margin of the calyx - like cup , and then the mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres ...
Página 22
... margin is in most instances pro- longed more or less upon each tentacle , as a narrow triangular process , so as to present a sort of scalloped or festooned appearance ; the festooning of the margin is most marked in Fredericella ; in ...
... margin is in most instances pro- longed more or less upon each tentacle , as a narrow triangular process , so as to present a sort of scalloped or festooned appearance ; the festooning of the margin is most marked in Fredericella ; in ...
Página 25
... margin of the lophophore ; these bands are continuous with one another below , and when they arrive at the intervals between the roots of the tentacula , each divides into two others , which would appear to run along the opposed sides ...
... margin of the lophophore ; these bands are continuous with one another below , and when they arrive at the intervals between the roots of the tentacula , each divides into two others , which would appear to run along the opposed sides ...
Página 31
... margin of the arm . When it arrives at the extremity of the arm it turns on itself , and in its retrograde course gives off similar filaments to the tentacula placed upon the inner margin . I have thus traced it back to the base of the ...
... margin of the arm . When it arrives at the extremity of the arm it turns on itself , and in its retrograde course gives off similar filaments to the tentacula placed upon the inner margin . I have thus traced it back to the base of the ...
Página 37
... margin ; as yet , there is no trace of tentacula . The retractor muscles show themselves as two fasciculi passing off from the base of the lophophore , and the funiculus may also be seen attached to the posterior extremity of the body ...
... margin ; as yet , there is no trace of tentacula . The retractor muscles show themselves as two fasciculi passing off from the base of the lophophore , and the funiculus may also be seen attached to the posterior extremity of the body ...
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