A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 7
Let us still further suppose the alimentary tube , by means of a system of muscles , to admit of being retracted or ... the retraction being accompanied by an invagination of the sac so as partially or entirely to include the oral ...
Let us still further suppose the alimentary tube , by means of a system of muscles , to admit of being retracted or ... the retraction being accompanied by an invagination of the sac so as partially or entirely to include the oral ...
Página 8
The part of the cell through which the polypide admits of protrusion and retraction is the orifice of the cell . * Πολυποὺς , εἶδος . † Κοινὸς , οἰκίον . † Εκτος , κύστις . Επι , στομα . § ̓́Ενδον , κύστις . || Λόφος , φορέω .
The part of the cell through which the polypide admits of protrusion and retraction is the orifice of the cell . * Πολυποὺς , εἶδος . † Κοινὸς , οἰκίον . † Εκτος , κύστις . Επι , στομα . § ̓́Ενδον , κύστις . || Λόφος , φορέω .
Página 10
Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the ininvertible portion , and acting as an operculum in the retracted state . Polypide completely retractile ; evagination perfect ; orifice of the ...
Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the ininvertible portion , and acting as an operculum in the retracted state . Polypide completely retractile ; evagination perfect ; orifice of the ...
Página 11
It must not , however , be supposed that there is here any proper orifice , the retraction and exsertion consisting merely in an invagination and evagination of the anterior part of the cell . The cœnocium , in every case , except in ...
It must not , however , be supposed that there is here any proper orifice , the retraction and exsertion consisting merely in an invagination and evagination of the anterior part of the cell . The cœnocium , in every case , except in ...
Página 12
This thin , non - contractile portion of the endocyst constitutes the tentacular sheath which encloses and protects the tentacula during the retracted state of the polypide . Near the spot where the endocyst ...
This thin , non - contractile portion of the endocyst constitutes the tentacular sheath which encloses and protects the tentacula during the retracted state of the polypide . Near the spot where the endocyst ...
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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