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 19
... tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly whirled away by the tentacular currents . It was these excrementitious pellets that Turpin mistook for unarmed ova in ...
... tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly whirled away by the tentacular currents . It was these excrementitious pellets that Turpin mistook for unarmed ova in ...
Página 21
... tube , may be very plainly seen in the extremity of each . tentacle ; this condition would also seem to exist in other genera , but it is nowhere so well marked as in Cristatella . In all the fresh - water genera , with the exception of ...
... tube , may be very plainly seen in the extremity of each . tentacle ; this condition would also seem to exist in other genera , but it is nowhere so well marked as in Cristatella . In all the fresh - water genera , with the exception of ...
Página 22
... tubes , a supposition which some appearances seem to warrant , and then we might perhaps view it as indicating the presence of a water - vascular system . * See previous note . + Quelques Observations sur les Polypes d'eau douce ...
... tubes , a supposition which some appearances seem to warrant , and then we might perhaps view it as indicating the presence of a water - vascular system . * See previous note . + Quelques Observations sur les Polypes d'eau douce ...
Página 23
... tubes in the substance of the endocyst , which may afford the necessary channels of communication , or it may be that it is in simple transudation through the walls of the alimentary canal that we are to seek for the true mode in which ...
... tubes in the substance of the endocyst , which may afford the necessary channels of communication , or it may be that it is in simple transudation through the walls of the alimentary canal that we are to seek for the true mode in which ...
Página 27
... tube to assume a regular quadrilateral figure . The corneous ribs already described correspond to the centre of the intervals between the insertion of the muscles . Mr. Hancock * enumerates , under the name of superior tube retractors ...
... tube to assume a regular quadrilateral figure . The corneous ribs already described correspond to the centre of the intervals between the insertion of the muscles . Mr. Hancock * enumerates , under the name of superior tube retractors ...
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