A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28Ray Society, 1856 - 119 páginas |
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Página 17
... distinct anus by perforating the tentacular sheath just below the mouth , and at the concave side of the lophophore . b . Gymnolæmata . In Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with ...
... distinct anus by perforating the tentacular sheath just below the mouth , and at the concave side of the lophophore . b . Gymnolæmata . In Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with ...
Página 66
... distinct sub - class of his Polypiaires , under the name of Polypiaria dubia for such as have the tentacula borne upon two diverging arms , in the form of a horse- shoe . It includes the fresh - water genera then known , namely ...
... distinct sub - class of his Polypiaires , under the name of Polypiaria dubia for such as have the tentacula borne upon two diverging arms , in the form of a horse- shoe . It includes the fresh - water genera then known , namely ...
Página 109
... distinct groups of branches , which are united to one another by a simple connecting tube , from which they extend in two opposite directions . The ectocyst is brown , becoming lighter towards the extremities of the branches , and ...
... distinct groups of branches , which are united to one another by a simple connecting tube , from which they extend in two opposite directions . The ectocyst is brown , becoming lighter towards the extremities of the branches , and ...
Otras ediciones - Ver todas
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 longitudinal 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