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 20
... external layer consists of rounded cells filled with a colourless fluid , and often presenting a bright nucleus . Some of those cells which lie upon the back of the tentacle become in certain genera enlarged , giving a vesicular ...
... external layer consists of rounded cells filled with a colourless fluid , and often presenting a bright nucleus . Some of those cells which lie upon the back of the tentacle become in certain genera enlarged , giving a vesicular ...
Página 39
... external transparent membrane , which is soon torn and disappears . When exposed to conditions favorable for its further development , the two faces , after a longer or shorter period , separate from one another , as has been already ...
... external transparent membrane , which is soon torn and disappears . When exposed to conditions favorable for its further development , the two faces , after a longer or shorter period , separate from one another , as has been already ...
Página 68
... external surface of the alimentary canal as ciliated . He believes he has seen at the base of each tentacle an aperture , which he regards as an aquiferous mouth ( " bouche aquifère " ) , destined to give admission to the external water ...
... external surface of the alimentary canal as ciliated . He believes he has seen at the base of each tentacle an aperture , which he regards as an aquiferous mouth ( " bouche aquifère " ) , destined to give admission to the external water ...
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