A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 107
The commencement of each polypidom has the black envelope of the originating
egg ( statoblast ) adherent . " Plumatella Allmani certainly comes very close to P.
emarginata and P. diffusa ; it is , however , distinguished from both by its cells ...
The commencement of each polypidom has the black envelope of the originating
egg ( statoblast ) adherent . " Plumatella Allmani certainly comes very close to P.
emarginata and P. diffusa ; it is , however , distinguished from both by its cells ...
Página 108
Cænæcium adherent , irregularly branched ; cells somewhat dilated towards the
orifices , with a furrow carinated . Tentacula about fifty ; festooning of calyx deep
and distinct . Statoblasts broad . SYNONYM . — 1850 . Plumatella Dumortieri .
Cænæcium adherent , irregularly branched ; cells somewhat dilated towards the
orifices , with a furrow carinated . Tentacula about fifty ; festooning of calyx deep
and distinct . Statoblasts broad . SYNONYM . — 1850 . Plumatella Dumortieri .
Página 114
The cænæcium is partly free , partly adherent . The adherent portion extends
over the under surface of stones as a branched confervoid growth , the branches
being given off either opposite to one another in pairs , or else singly , the ...
The cænæcium is partly free , partly adherent . The adherent portion extends
over the under surface of stones as a branched confervoid growth , the branches
being given off either opposite to one another in pairs , or else singly , the ...
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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