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 12
... seen in various stages of formation . These different stages may be satisfactorily followed , and afford a very ... seen to be composed of greatly elongated fusiform cells , having their pointed extremities in con- nection with one ...
... seen in various stages of formation . These different stages may be satisfactorily followed , and afford a very ... seen to be composed of greatly elongated fusiform cells , having their pointed extremities in con- nection with one ...
Página 36
... 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 a short time it presents all round a series of minute ...
... 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 a short time it presents all round a series of minute ...
Página 85
... seen to be entirely resolved into a brood of young cells , which completely filled the parent - cell ; while in the largest individuals these secondary cells might themselves be seen in various stages of growth and subdivision , some ...
... seen to be entirely resolved into a brood of young cells , which completely filled the parent - cell ; while in the largest individuals these secondary cells might themselves be seen in various stages of growth and subdivision , some ...
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 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 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