A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Página 7
... surrounded by tentacles . b . Alimentary canal . c . Anus . d . Nervous ganglion . e . Membranous investing sac . f . Testis . f ' . Ovary . g . Retractor muscle . Let us imagine an alimentary canal , consisting of œsophagus , stomach ...
... surrounded by tentacles . b . Alimentary canal . c . Anus . d . Nervous ganglion . e . Membranous investing sac . f . Testis . f ' . Ovary . g . Retractor muscle . Let us imagine an alimentary canal , consisting of œsophagus , stomach ...
Página 14
... surrounded by a distinct layer of somewhat elongated cellules placed perpendicularly to its surface . The body which thus closes up the centre of the annular septum has , without doubt , some office to perform besides that of simply ...
... surrounded by a distinct layer of somewhat elongated cellules placed perpendicularly to its surface . The body which thus closes up the centre of the annular septum has , without doubt , some office to perform besides that of simply ...
Página 17
... surrounding the stomach , and are probably muscular fibres ; they are particularly evident in Alcyonella and Plumatella towards the fundus of the stomach ; they become less distinct as we ascend toward the oesophagus , and totally 3 ...
... surrounding the stomach , and are probably muscular fibres ; they are particularly evident in Alcyonella and Plumatella towards the fundus of the stomach ; they become less distinct as we ascend toward the oesophagus , and totally 3 ...
Página 19
... surrounding water and rapidly whirled away by the tentacular currents . It was these excrementitious pellets that Turpin mistook for unarmed ova in Cristatella . ( 3. ) Organs of Respiration and Circulation . Upon the tentacular crown ...
... surrounding water and rapidly whirled away by the tentacular currents . It was these excrementitious pellets that Turpin mistook for unarmed ova in Cristatella . ( 3. ) Organs of Respiration and Circulation . Upon the tentacular crown ...
Página 20
... surrounding the margin of the cup . e . Mouth . f . Esophagus . g . Stomach . h . Rectum . i . Anus . k . Epistome . 7. Ganglion . m . Generative organ . n . Retractor muscle . o . Lophophore . The tentacula are connected to one another ...
... surrounding the margin of the cup . e . Mouth . f . Esophagus . g . Stomach . h . Rectum . i . Anus . k . Epistome . 7. Ganglion . m . Generative organ . n . Retractor muscle . o . Lophophore . The tentacula are connected to one another ...
Otras ediciones - Ver todas
A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
A Monograph of the Fresh-Water Polyzoa, Including All the Known Species ... George James Allman Sin vista previa disponible - 2009 |
Términos y frases comunes
action adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella 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 Hancock Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organ 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