A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 40
In two species of fresh - water Polyzoa , Plumatella emarginata and Alcyonella
Benedeni , I have observed , besides the ordinary statoblasts , another kind
which is characterised by some peculiarities . In both these Polyzoa the cells may
be ...
In two species of fresh - water Polyzoa , Plumatella emarginata and Alcyonella
Benedeni , I have observed , besides the ordinary statoblasts , another kind
which is characterised by some peculiarities . In both these Polyzoa the cells may
be ...
Página 71
The statoblasts themselves in Alcyonella and Fredericella are described ... them ,
while some confusion has arisen with regard to the statoblast of Lophopus
crystallinus , the body described as such being manifestly the statoblast of
Cristatella .
The statoblasts themselves in Alcyonella and Fredericella are described ... them ,
while some confusion has arisen with regard to the statoblast of Lophopus
crystallinus , the body described as such being manifestly the statoblast of
Cristatella .
Página 87
Another very valuable character is obtained from the shape of the statoblasts .
The ordinary or free statoblasts , both in Alcyonella and Plumatella , present two
different shapes ; in some species they are broadly elliptical , the diameters of the
...
Another very valuable character is obtained from the shape of the statoblasts .
The ordinary or free statoblasts , both in Alcyonella and Plumatella , present two
different shapes ; in some species they are broadly elliptical , the diameters of the
...
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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