A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 22
... latter by the whole mass of the generative system , is the nervous ganglion , close to which , and lying between it and the oesophagus , is a peculiar organ in the form of a minute tubular cavity clothed with actively vibrating cilia ...
... latter by the whole mass of the generative system , is the nervous ganglion , close to which , and lying between it and the oesophagus , is a peculiar organ in the form of a minute tubular cavity clothed with actively vibrating cilia ...
Página 24
... latter situation ; indeed , my own observations are entirely opposed to their presence on the alimen- tary canal ; and I cannot help thinking that this statement of Van Beneden is connected with some error of observation . I have ...
... latter situation ; indeed , my own observations are entirely opposed to their presence on the alimen- tary canal ; and I cannot help thinking that this statement of Van Beneden is connected with some error of observation . I have ...
Página 26
... latter passes into the tentacular sheath . Though a contraction of the endocyst at this spot , as if occasioned by the action of a powerful sphincter , may be always observed when the polypide is completely retracted , yet the ...
... latter passes into the tentacular sheath . Though a contraction of the endocyst at this spot , as if occasioned by the action of a powerful sphincter , may be always observed when the polypide is completely retracted , yet the ...
Página 28
... of the latter to move in the direction of least resist- ance , or through the orifice of the cell : for the mere straightening of the esophagus , to which Dr. A. Farre * attributes so large a share 28 MUSCULAR SYSTEM .
... of the latter to move in the direction of least resist- ance , or through the orifice of the cell : for the mere straightening of the esophagus , to which Dr. A. Farre * attributes so large a share 28 MUSCULAR SYSTEM .
Página 38
... latter an elegantly mammillated condition . In some cases , however , the cellular condition of one or both discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are also for ...
... latter an elegantly mammillated condition . In some cases , however , the cellular condition of one or both discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are also for ...
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