A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 6-10 de 29
Página 21
... surrounded at its base by an exceedingly delicate water Phylactolæmata is probably united . In order to understand this relation , it is necessary to conceive of the polypide as partially retracted ; the invaginated portion of the ...
... surrounded at its base by an exceedingly delicate water Phylactolæmata is probably united . In order to understand this relation , it is necessary to conceive of the polypide as partially retracted ; the invaginated portion of the ...
Página 22
... surrounding structures . Its situation would suggest the proba- bility of its being an organ of sense . It is possible , however , that it is a portion of a more extensive system of tubes , a supposition which some appearances seem to ...
... surrounding structures . Its situation would suggest the proba- bility of its being an organ of sense . It is possible , however , that it is a portion of a more extensive system of tubes , a supposition which some appearances seem to ...
Página 26
... surrounding the termination of the invaginated endocyst at the point where 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 ...
... surrounding the termination of the invaginated endocyst at the point where 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 ...
Página 29
... surrounding fluid , by the countless cilia which instantly commence their untiring vibration on the sides of the tentacula . The mechanism of retraction is easily understood . Here the perigastric fluid being no * Observations on the ...
... surrounding fluid , by the countless cilia which instantly commence their untiring vibration on the sides of the tentacula . The mechanism of retraction is easily understood . Here the perigastric fluid being no * Observations on the ...
Página 31
... surrounding the œsophagus at this place . There is no other ganglion than the one just described ; and , unless it be the epistome , and possibly in Pedicellina a peculiar ciliated organ ‡ in the neighbourhood of the ganglion , nothing ...
... surrounding the œsophagus at this place . There is no other ganglion than the one just described ; and , unless it be the epistome , and possibly in Pedicellina a peculiar ciliated organ ‡ in the neighbourhood of the ganglion , nothing ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus 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