A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 3
... bodies , each characterised by the possession of an elegant crown of tentacula borne on the margin of a crescent - shaped disc . This beautiful tentacular plume is one of its most striking features ; and as Trembley naturally supposed ...
... bodies , each characterised by the possession of an elegant crown of tentacula borne on the margin of a crescent - shaped disc . This beautiful tentacular plume is one of its most striking features ; and as Trembley naturally supposed ...
Página 5
... body cavity in Gorgonia , Isis , Alcyonium , & c . , to the tunics of an Ascidian or the mantle of an ordinary Mollusc , a comparison which plainly shows that he had no idea whatever of the relation in question . + Zoological Researches ...
... body cavity in Gorgonia , Isis , Alcyonium , & c . , to the tunics of an Ascidian or the mantle of an ordinary Mollusc , a comparison which plainly shows that he had no idea whatever of the relation in question . + Zoological Researches ...
Página 11
... of protrusion and retraction is very imperfect , and is here limited to such change of position as is connected with a slight extension and flexion of the œsophagus . consist almost entirely of bodies exactly resembling the nuclei of 11.
... of protrusion and retraction is very imperfect , and is here limited to such change of position as is connected with a slight extension and flexion of the œsophagus . consist almost entirely of bodies exactly resembling the nuclei of 11.
Página 12
... bodies exactly resembling the nuclei of the cells ; some of these intercellular nuclei contain two nucleoli , and seem to be undergoing division , while round others a young cell may be seen in various stages of formation . These ...
... bodies exactly resembling the nuclei of the cells ; some of these intercellular nuclei contain two nucleoli , and seem to be undergoing division , while round others a young cell may be seen in various stages of formation . These ...
Página 13
... bodies in a tubular network in the substance of the endocyst is a fact of great interest . It is nearly certain that whatever may have been the origin of the corpuscles , they found the tubes already existing for their reception . It ...
... bodies in a tubular network in the substance of the endocyst is a fact of great interest . It is nearly certain that whatever may have been the origin of the corpuscles , they found the tubes already existing for their reception . It ...
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