A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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... occur often in great abundance in the waters round London , and a slight acquaintance with their habits , as described in the present work , will render them very easy of detection ; while few objects are capable of affording greater ...
... occur often in great abundance in the waters round London , and a slight acquaintance with their habits , as described in the present work , will render them very easy of detection ; while few objects are capable of affording greater ...
Página 5
... occurred to him , and he imagines the affinity with the Mollusca to be possessed by the entire group of his polypes à polypiers . " J'ai dit , " says he ( ' Exposition Méthodique des Genres de l'Ordre des Polypiers ' , Preface , p . vii ) ...
... occurred to him , and he imagines the affinity with the Mollusca to be possessed by the entire group of his polypes à polypiers . " J'ai dit , " says he ( ' Exposition Méthodique des Genres de l'Ordre des Polypiers ' , Preface , p . vii ) ...
Página 8
... occur , two others in common use ought to be here defined . The cells are the little chambers of which the cœnœcium is made up , and in each of which a polypide is lodged . The part of the cell through which the polypide admits of ...
... occur , two others in common use ought to be here defined . The cells are the little chambers of which the cœnœcium is made up , and in each of which a polypide is lodged . The part of the cell through which the polypide admits of ...
Página 14
... occur here between every cell , and consist of an annular process , which projects transversely from the ectocyst into the interior of the cell , with a covering of endocyst on its upper and under surface ( Pl . X , fig . 4 , b ...
... occur here between every cell , and consist of an annular process , which projects transversely from the ectocyst into the interior of the cell , with a covering of endocyst on its upper and under surface ( Pl . X , fig . 4 , b ...
Página 15
... occur in others , and was therefore probably accidental . Upon the whole , the reactions of the pergamentaceous ectocysts of Plumatella , & c . , are rather in favour of this tissue being composed of chitine . It is quite insoluble in ...
... occur in others , and was therefore probably accidental . Upon the whole , the reactions of the pergamentaceous ectocysts of Plumatella , & c . , are rather in favour of this tissue being composed of chitine . It is quite insoluble in ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus 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