A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 14
In certain species of fresh - water Polyzoa , transverse septa exist between the
cells . ... In Paludicella they acquire their maximum in development and
constancy ; they occur here between every cell , and consist of an annular
process , which ...
In certain species of fresh - water Polyzoa , transverse septa exist between the
cells . ... In Paludicella they acquire their maximum in development and
constancy ; they occur here between every cell , and consist of an annular
process , which ...
Página 36
fleshy lining , continuous with the endocyst ; this internal tunic has numerous
large , round , nucleated cells distributed through its substance , and ... The two
tunics of the gemma are to become the ectocyst and endocyst of the future cell .
fleshy lining , continuous with the endocyst ; this internal tunic has numerous
large , round , nucleated cells distributed through its substance , and ... The two
tunics of the gemma are to become the ectocyst and endocyst of the future cell .
Página 85
Some were seen to consist in a spherical transparent cell , with nearly colourless
granular contents , involving numerous minute spherical bodies , apparently
young cells ; these contents were aggregated on the inner surface of the wall ...
Some were seen to consist in a spherical transparent cell , with nearly colourless
granular contents , involving numerous minute spherical bodies , apparently
young cells ; these contents were aggregated on the inner surface of the wall ...
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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