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 12
... Paludicella , whose transparent ectocyst admits of a distinct view of all the contained parts , the fibres are collected into numerous transverse bands ( Pl . X , figs . 3 , 4 , v ) , which we may trace throughout the whole extent of ...
... Paludicella , whose transparent ectocyst admits of a distinct view of all the contained parts , the fibres are collected into numerous transverse bands ( Pl . X , figs . 3 , 4 , v ) , which we may trace throughout the whole extent of ...
Página 14
... Paludicella is formed of a smooth pergamentaceous semi - transparent membrane , free from earthy deposit , and of a deep brown colour . Towards the orifice of the cell it becomes thin and delicate , and is here strengthened by four ...
... Paludicella is formed of a smooth pergamentaceous semi - transparent membrane , free from earthy deposit , and of a deep brown colour . Towards the orifice of the cell it becomes thin and delicate , and is here strengthened by four ...
Página 15
... Paludicella , which , with the exception of Urnatella ( ? ) , is the only fresh - water representative of the division with orbicular lophophore ( Gymnolćmata ) , presents some peculiarities , and should be examined by itself . a ...
... Paludicella , which , with the exception of Urnatella ( ? ) , is the only fresh - water representative of the division with orbicular lophophore ( Gymnolćmata ) , presents some peculiarities , and should be examined by itself . a ...
Página 17
... Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with slightly projectile margin , and is totally destitute of the valve - like appendage which , unless Urnatella should prove an exception , is ...
... Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with slightly projectile margin , and is totally destitute of the valve - like appendage which , unless Urnatella should prove an exception , is ...
Página 18
... Paludicella however , the stomach in the immediate neighbourhood of the pyloric orifice is lined with long vibratile cilia ( Pl . X , figs . 3 , 4 ) , by which portions of alimentary matter , pushed onwards by the peristaltic ...
... Paludicella however , the stomach in the immediate neighbourhood of the pyloric orifice is lined with long vibratile cilia ( Pl . X , figs . 3 , 4 ) , by which portions of alimentary matter , pushed onwards by the peristaltic ...
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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 character cilia cœnćcium 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 hćmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnćus 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 ŕ Panache polypide Polyzoon portion 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