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 38
... 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 the annulus a light spongy texture , and act as a float by which the ...
... 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 the annulus a light spongy texture , and act as a float by which the ...
Página 75
... occur in these islands at the level of the sea , and most of them have also been met with in our alpine and subalpine lakes . I have found Plumatella repens and P. fruticosa in Lac Leculejo in the Pyrenees , at an altitude of 4590 feet ...
... occur in these islands at the level of the sea , and most of them have also been met with in our alpine and subalpine lakes . I have found Plumatella repens and P. fruticosa in Lac Leculejo in the Pyrenees , at an altitude of 4590 feet ...
Página 99
... occurs in the free variation where , the elongation of the cells not being restrained by adherence to a fixed ... occurred between almost every cell , while the elongated claviform figure of the cells increased the resemblance to ...
... occurs in the free variation where , the elongation of the cells not being restrained by adherence to a fixed ... occurred between almost every cell , while the elongated claviform figure of the cells increased the resemblance to ...
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