A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 28
... sheath . Their action checks the complete evagination of the sheath in the way we shall presently see . ( 4. ) Vaginal Sphincter . This was also pointed out for the first time by Mr. Hancock . It consists of a set of fibres ( Pl . X ...
... sheath . Their action checks the complete evagination of the sheath in the way we shall presently see . ( 4. ) Vaginal Sphincter . This was also pointed out for the first time by Mr. Hancock . It consists of a set of fibres ( Pl . X ...
Página 29
... sheath , continues to be carried outwards by the advancing polypide , the posterior parieto - vaginal muscles slowly relaxing to admit of it . These muscles , however , after a certain time refuse to suffer further relaxation , and thus ...
... sheath , continues to be carried outwards by the advancing polypide , the posterior parieto - vaginal muscles slowly relaxing to admit of it . These muscles , however , after a certain time refuse to suffer further relaxation , and thus ...
Página 30
... sheath , and the polypide rests secure in the recesses of the cell . The muscles of these animals are especially interesting in a physiological point of view , for they seem to present us with an example of true muscular tissue reduced ...
... sheath , and the polypide rests secure in the recesses of the cell . The muscles of these animals are especially interesting in a physiological point of view , for they seem to present us with an example of true muscular tissue reduced ...
Página 34
... sheath , with the parieto - vaginal bands , had become evident , and the fluid in which the embryo floats within the walls of the ovum is soon afterwards admitted to the lophophore of the young polypides . The parieto - vaginal bands ...
... sheath , with the parieto - vaginal bands , had become evident , and the fluid in which the embryo floats within the walls of the ovum is soon afterwards admitted to the lophophore of the young polypides . The parieto - vaginal bands ...
Página 36
... sheath , within which , when viewed in front , may be seen an oval ring ( fig . 5 ) which is afterwards to become the lophophore of the polypide . This ring is at first quite simple , resembling a mere fold of thickish membrane , but in ...
... sheath , within which , when viewed in front , may be seen an oval ring ( fig . 5 ) which is afterwards to become the lophophore of the polypide . This ring is at first quite simple , resembling a mere fold of thickish membrane , but in ...
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