A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 59
description and figures of the external characters are tolerably good , with the
exception of what he says of a kind of ... in which it presents somewhat the
appearance he has described ; and believing this to be a permanent character of
his ...
description and figures of the external characters are tolerably good , with the
exception of what he says of a kind of ... in which it presents somewhat the
appearance he has described ; and believing this to be a permanent character of
his ...
Página 70
The digestive apparatus was also described , as well as the muscles which act
on the alimentary canal and invaginated tunic ; it was shown that the latter
muscles consisted of two distinct sets , an anterior and a posterior , whose
peculiar ...
The digestive apparatus was also described , as well as the muscles which act
on the alimentary canal and invaginated tunic ; it was shown that the latter
muscles consisted of two distinct sets , an anterior and a posterior , whose
peculiar ...
Página 71
The ciliated embryos of Alcyonella are also described and figured , but the
authors do not pursue their development into much detail , while they consider
them as identical with statoblasts in a particular stage of evolution , and deprived
of their ...
The ciliated embryos of Alcyonella are also described and figured , but the
authors do not pursue their development into much detail , while they consider
them as identical with statoblasts in a particular stage of evolution , and deprived
of their ...
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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