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 37
... Fredericella alone is the marginal ring so little developed as to be scarcely apparent . In all , one side would seem to be slightly more convex than the other . In all cases , except Cristatella and Pectinatella , the statoblast is ...
... Fredericella alone is the marginal ring so little developed as to be scarcely apparent . In all , one side would seem to be slightly more convex than the other . In all cases , except Cristatella and Pectinatella , the statoblast is ...
Página 46
... Fredericella and the Hippocrepian Polyzoa . This correspondence will be rendered more obvious by imagining the branchial sinus to be depressed towards the neural side of the Ascidian , by a rotation round its oral extremity through an ...
... Fredericella and the Hippocrepian Polyzoa . This correspondence will be rendered more obvious by imagining the branchial sinus to be depressed towards the neural side of the Ascidian , by a rotation round its oral extremity through an ...
Página 48
... Fredericella , in which , however , the lophophore still retains a bilateral figure , which is rendered still more decided by the presence of the epistome . In the marine genus . Lagenella , the epistome has disappeared , but the ...
... Fredericella , in which , however , the lophophore still retains a bilateral figure , which is rendered still more decided by the presence of the epistome . In the marine genus . Lagenella , the epistome has disappeared , but the ...
Página 60
... Fredericella . Blumenbach characterises it in his manual as " Tubularia crista infundibuliformi , ad basin ciliata ; " the latter part of this diagnosis can scarcely refer to the true vibratile cilia which clothe the tentacula in their ...
... Fredericella . Blumenbach characterises it in his manual as " Tubularia crista infundibuliformi , ad basin ciliata ; " the latter part of this diagnosis can scarcely refer to the true vibratile cilia which clothe the tentacula in their ...
Página 65
... Fredericella sultana . Dr. Fleming has traced the entire course of the alimentary canal , and has recognised in these animals the true polyzoal type of structure . Ehrenberg , in his ' Symbolæ Physicæ , ' 1831 , defines the genus ...
... Fredericella sultana . Dr. Fleming has traced the entire course of the alimentary canal , and has recognised in these animals the true polyzoal type of structure . Ehrenberg , in his ' Symbolæ Physicæ , ' 1831 , defines the genus ...
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
adherent Alcyonella Alcyonella fungosa Alcyonella stagnorum alimentary canal Allman anatomy animal annulus Ascidian attached become Beneden Bowerbankia Brachiopoda branches branchial sac Brit Brux campanulata cavity cell cilia cœnocium crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst embryo endocyst epistome exserted external fibres flabellum fluid fresh-water Polyzoa funiculus ganglion genera genus Gervais hæmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnæus lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed œsophagus organ orifice Original figures ovary ovum Paludicella parieto-vaginal muscles peculiar Pedicellina perigastric space Plumatella repens Polype à Panache polypide Polyzoon portion posterior present Raspail respiratory retraction retractor retractor muscles Rösel seen septa side species specimens statoblasts stomach structure surface tentacles tentacula tentacular crown tentacular sheath thoracic chamber transparent transverse Trembley tubes Tubularia repens tunic Tunicata Urnatella walls Zooph Zoophytes