A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Resultados 6-10 de 75
Página 19
... Plumatella , and Alcyonella , its neural margin , or that which corresponds to the side of the rectum , is extended into two long triangular lobes or arms , so as to cause the lophophore in these genera to present the form of a deep ...
... Plumatella , and Alcyonella , its neural margin , or that which corresponds to the side of the rectum , is extended into two long triangular lobes or arms , so as to cause the lophophore in these genera to present the form of a deep ...
Página 22
... Plumatella it is scarcely perceptible . A high power of the microscope , and carefully adjusted illumination , will enable us to detect in the calyciform membrane certain delicate anastomosing lines . These appear to indicate the ...
... Plumatella it is scarcely perceptible . A high power of the microscope , and carefully adjusted illumination , will enable us to detect in the calyciform membrane certain delicate anastomosing lines . These appear to indicate the ...
Página 29
... Plumatella and the other fresh - water phylactolæmatous genera , as the polypide continues to advance from the cell , the invaginated endocyst is gradually carried out with it by a process of evagination , which proceeds up to a certain ...
... Plumatella and the other fresh - water phylactolæmatous genera , as the polypide continues to advance from the cell , the invaginated endocyst is gradually carried out with it by a process of evagination , which proceeds up to a certain ...
Página 30
... Plumatella . In Paludicella I have witnessed a curious phenomenon presented by the muscular fibre . In this polyzoon the fibres of the great retractor muscle , while lying relaxed in the bottom of the cell after the retraction of the ...
... Plumatella . In Paludicella I have witnessed a curious phenomenon presented by the muscular fibre . In this polyzoon the fibres of the great retractor muscle , while lying relaxed in the bottom of the cell after the retraction of the ...
Página 35
... Plumatella fruticosa presents similar developmental phenomena ; the ciliated larva , however , in this species , differs from that just described , in having its polypide single ( Pl . XI , fig . 35 ) . If a specimen of Alcyonella ...
... Plumatella fruticosa presents similar developmental phenomena ; the ciliated larva , however , in this species , differs from that just described , in having its polypide single ( Pl . XI , fig . 35 ) . If a specimen of Alcyonella ...
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