A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 20
... give to the crown of tentacula the form presented by the infundibulate genera . The result of this arrangement is , that the anus presents the anomalous condition of opening within the tentacular crater . It will be easily seen ...
... give to the crown of tentacula the form presented by the infundibulate genera . The result of this arrangement is , that the anus presents the anomalous condition of opening within the tentacular crater . It will be easily seen ...
Página 29
... gives rise to the membranous cup which projects from the lips of the orifice in the exserted state of the polypide . This cup , therefore , which may plainly be seen under a proper illumi- nation to consist of a membrane doubled into ...
... gives rise to the membranous cup which projects from the lips of the orifice in the exserted state of the polypide . This cup , therefore , which may plainly be seen under a proper illumi- nation to consist of a membrane doubled into ...
Página 31
... gives off similar filaments to the tentacula placed upon the inner margin . I have thus traced it back to the base of the arms , but have here failed in my attempts to follow it further ; it is , however , highly probable that it passes ...
... gives off similar filaments to the tentacula placed upon the inner margin . I have thus traced it back to the base of the arms , but have here failed in my attempts to follow it further ; it is , however , highly probable that it passes ...
Página 36
... give to the polypide and its cell the form presented by the adult . Up to this period the young polypide has been entirely shut off from all communication with the external water , and its nutrition must have been effected through the ...
... give to the polypide and its cell the form presented by the adult . Up to this period the young polypide has been entirely shut off from all communication with the external water , and its nutrition must have been effected through the ...
Página 37
... give the name of Statoblasts . From the earliest period that the fresh - water Polyzoa became an object of study , the statoblasts attracted the attention of observers . Their form is not exactly the same in the different species , but ...
... give the name of Statoblasts . From the earliest period that the fresh - water Polyzoa became an object of study , the statoblasts attracted the attention of observers . Their form is not exactly the same in the different species , but ...
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