A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 29
Let us suppose the polypide withdrawn into the recesses of the cell , and that
hunger or some other stimulus impresses on it a desire of protrusion . The
endocyst now contracts on the perigastric fluid , which , pressing on the polypide ,
forces it ...
Let us suppose the polypide withdrawn into the recesses of the cell , and that
hunger or some other stimulus impresses on it a desire of protrusion . The
endocyst now contracts on the perigastric fluid , which , pressing on the polypide ,
forces it ...
Página 34
In the interior of the protrusible portion , and before the disappearance of the
transverse bands , a polypide is developed ( Pl . XI , fig . 30 ) . This appears to
take place in a manner quite similar to that by which new polypides are produced
by ...
In the interior of the protrusible portion , and before the disappearance of the
transverse bands , a polypide is developed ( Pl . XI , fig . 30 ) . This appears to
take place in a manner quite similar to that by which new polypides are produced
by ...
Página 36
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 ( fig . 5 ) which is afterwards to become the lophophore of the
polypide ...
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 ( fig . 5 ) which is afterwards to become the lophophore of the
polypide ...
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A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British canal cavity cell character cilia closely complete condition connected consists constitutes contained continuous Cristatella crown 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 Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organs 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
Información bibliográfica
| Título | A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, George James Allman Volumen13 de DE-601)130488305: Ray Society Publications, Ray Society Ray Society, Ray Society Volumen28 de Ray society ... [Publications |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | Universidad de Illinois en Urbana-Champaign |
| Digitalizado | 13 Oct. 2015 |
| Largo | 119 páginas |
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