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 16
... becomes gradually narrower as it approaches the latter , into which it opens by a very distinct conical projection ( Pl . III , fig . 7 , ƒ ' ) . To the œsophagus immediately succeeds the stomach , without the intervention of any dis ...
... becomes gradually narrower as it approaches the latter , into which it opens by a very distinct conical projection ( Pl . III , fig . 7 , ƒ ' ) . To the œsophagus immediately succeeds the stomach , without the intervention of any dis ...
Página 17
... become less decided towards the fundus of the stomach , and in Paludicella they are entirely absent . This internal layer is composed of easily separable spherical cells ( Pl . II , figs . 6 , 7 ) , containing a colourless fluid , in ...
... become less decided towards the fundus of the stomach , and in Paludicella they are entirely absent . This internal layer is composed of easily separable spherical cells ( Pl . II , figs . 6 , 7 ) , containing a colourless fluid , in ...
Página 18
... become more prominent . In the stomach the food is destined to experience considerable delay ; it is here rapidly ... becoming imbued with the peculiar secretion of the gastric walls , and soon assumes a rich brown colour . After having ...
... become more prominent . In the stomach the food is destined to experience considerable delay ; it is here rapidly ... becoming imbued with the peculiar secretion of the gastric walls , and soon assumes a rich brown colour . After having ...
Página 19
... become separated at intervals from the mass , and are slowly propelled along the tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly whirled away by the tentacular currents ...
... become separated at intervals from the mass , and are slowly propelled along the tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly whirled away by the tentacular currents ...
Página 20
... become in certain genera enlarged , giving a vesicular appearance to the organ ; this is particularly evident in Cristatella . The internal layer is a delicate transparent membrane , in which I could detect no trace of approximated at ...
... become in certain genera enlarged , giving a vesicular appearance to the organ ; this is particularly evident in Cristatella . The internal layer is a delicate transparent membrane , in which I could detect no trace of approximated at ...
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