A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28Ray Society, 1856 - 119 páginas |
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Página 36
... mass into the interior of the young cell ( fig . 4 ) . It is the rudimental polypide , and we soon find in it a cavity , which is to become that of the tentacular sheath , within which , when viewed in front , may be seen an oval ring ...
... mass into the interior of the young cell ( fig . 4 ) . It is the rudimental polypide , and we soon find in it a cavity , which is to become that of the tentacular sheath , within which , when viewed in front , may be seen an oval ring ...
Página 82
... mass ; when ripe , floating . " The surface of the polype mass has the appearance of being covered with a dense mucor from the numerous tentacula projecting from it . Immediately beneath this , is a layer having a faint roseate hue ...
... mass ; when ripe , floating . " The surface of the polype mass has the appearance of being covered with a dense mucor from the numerous tentacula projecting from it . Immediately beneath this , is a layer having a faint roseate hue ...
Página 89
... mass presents a multitude of closely applied hexagonal or pentagonal orifices . The whole production now assumes the appearance of a spongy , honeycomb - like mass , and this has not unfrequently been mistaken for a fresh - water sponge ...
... mass presents a multitude of closely applied hexagonal or pentagonal orifices . The whole production now assumes the appearance of a spongy , honeycomb - like mass , and this has not unfrequently been mistaken for a fresh - water sponge ...
Otras ediciones - Ver todas
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 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