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 40
... statoblasts , another kind which is characterised by some peculiarities . In both these Polyzoa the cells may be observed towards the end of summer loaded with statoblasts which lie loose within them . These are the ordinary ones , and ...
... statoblasts , another kind which is characterised by some peculiarities . In both these Polyzoa the cells may be observed towards the end of summer loaded with statoblasts which lie loose within them . These are the ordinary ones , and ...
Página 71
... statoblasts in a particular stage of evolution , and deprived of their external shell . The statoblasts themselves in Alcyonella and Fredericella are described , but the essential structure of an ovum is attributed to them , while some ...
... statoblasts in a particular stage of evolution , and deprived of their external shell . The statoblasts themselves in Alcyonella and Fredericella are described , but the essential structure of an ovum is attributed to them , while some ...
Página 90
... statoblasts are of two kinds - free , and adherent . The free statoblasts are narrowly elliptical , approaching to bean - shaped ; the disc is brown , minutely mamillated ; the annulus is dull yellow , widely overlapping the disc ...
... statoblasts are of two kinds - free , and adherent . The free statoblasts are narrowly elliptical , approaching to bean - shaped ; the disc is brown , minutely mamillated ; the annulus is dull yellow , widely overlapping the disc ...
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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