A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 23
Meyen asserts the existence of an aperture in the vicinity of the anus , through
which , he tells us , he has witnessed the escape of an egg in Alcyonella ; * and
Siebold admits the correctness of this statement , and considers the aperture ...
Meyen asserts the existence of an aperture in the vicinity of the anus , through
which , he tells us , he has witnessed the escape of an egg in Alcyonella ; * and
Siebold admits the correctness of this statement , and considers the aperture ...
Página 31
The existence of striated fibre in the Polyzoa was first noticed by Milne - Edwards
, who detected it in Eschara ; * and Mr. Busk has since described and figured the
same form of tissue in Anguinaria spatulata , Notamia bursaria , and other ...
The existence of striated fibre in the Polyzoa was first noticed by Milne - Edwards
, who detected it in Eschara ; * and Mr. Busk has since described and figured the
same form of tissue in Anguinaria spatulata , Notamia bursaria , and other ...
Página 68
He describes the great supraæsophageal ganglion , and mentions the existence
of locomotive ciliated embryos in Alcyonella . He mentions having found , along
with M. Gervais , the Fredericella and Paludicella ; and in fine he shows how the
...
He describes the great supraæsophageal ganglion , and mentions the existence
of locomotive ciliated embryos in Alcyonella . He mentions having found , along
with M. Gervais , the Fredericella and Paludicella ; and in fine he shows how 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 characters cilia closely complete condition connected consists constitutes contained continuous corresponding 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 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