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 38
... discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are also for the most part larger than those of the disc and of a different colour ; they are filled with air , giving to ...
... discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are also for the most part larger than those of the disc and of a different colour ; they are filled with air , giving to ...
Página 56
... disc , margined with tentacula . This tenta- culiferous disc exactly resembled the lophophore and tentacula of a hippocrepian Polyzoon . In the body of the crescentic disc was placed the mouth , over which there arched a valve - like ...
... disc , margined with tentacula . This tenta- culiferous disc exactly resembled the lophophore and tentacula of a hippocrepian Polyzoon . In the body of the crescentic disc was placed the mouth , over which there arched a valve - like ...
Página 79
... disc , resembling the foot of a gasteropodous mollusc ; on this disc , which is contractile , and admits of frequent change of shape , the colony adheres to neighbouring objects , or creeps about on the submerged leaves and stems of ...
... disc , resembling the foot of a gasteropodous mollusc ; on this disc , which is contractile , and admits of frequent change of shape , the colony adheres to neighbouring objects , or creeps about on the submerged leaves and stems of ...
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