A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 103
mode of growth : and from the latter it is at once known by its cylindrical branches
and narrow statoblasts . In its general habit it bears a very close resemblance to
Fredericella , indeed from a luxuriant specimen of the latter polyzoon it is ...
mode of growth : and from the latter it is at once known by its cylindrical branches
and narrow statoblasts . In its general habit it bears a very close resemblance to
Fredericella , indeed from a luxuriant specimen of the latter polyzoon it is ...
Página 109
It is throughout closely adherent to the surface on which it grows , and is very
remarkable by its mode of development in two distinct groups of branches , which
are united to one another by a simple connecting tube , from which they extend in
...
It is throughout closely adherent to the surface on which it grows , and is very
remarkable by its mode of development in two distinct groups of branches , which
are united to one another by a simple connecting tube , from which they extend in
...
Página 114
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 development of the opposite branches being in the
latter ...
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 development of the opposite branches being in the
latter ...
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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