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 15
... Alcyonella fungosa , and in Fredericella sultana , imperfect septa may here and there be observed , while Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ...
... Alcyonella fungosa , and in Fredericella sultana , imperfect septa may here and there be observed , while Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ...
Página 32
... Alcyonella fungosa , a roundish mass ( Pl . III , fig . 7 , 4 ) attached by a short peduncle to the endocyst at a little distance within the orifice , and corresponding exactly in position to an ordinary bud , with the early stage of ...
... Alcyonella fungosa , a roundish mass ( Pl . III , fig . 7 , 4 ) attached by a short peduncle to the endocyst at a little distance within the orifice , and corresponding exactly in position to an ordinary bud , with the early stage of ...
Página 33
... Alcyonella . The testicle in Paludicella is an irregularly lobed mass ( Pl ... Alcyonella , separated , by a considerable interval , from the ovary ; it is ... fungosa . In this polyzoon the mature ovum consists of a granular vitellus ...
... Alcyonella . The testicle in Paludicella is an irregularly lobed mass ( Pl ... Alcyonella , separated , by a considerable interval , from the ovary ; it is ... fungosa . In this polyzoon the mature ovum consists of a granular vitellus ...
Página 35
... Alcyonella fungosa be cut into small pieces , under water , in the month of July or August , the ciliated embryos will be liberated in abundance , and may be examined . with facility . Gemmation . The development of gemmæ has already ...
... Alcyonella fungosa be cut into small pieces , under water , in the month of July or August , the ciliated embryos will be liberated in abundance , and may be examined . with facility . Gemmation . The development of gemmæ has already ...
Página 39
... Alcyonella fungosa the escape of an egg through an opening in the vicinity of the anus ; but , notwithstanding a similar observation already noticed as made by Van Beneden on the marine Laguncula repens , this I feel certain has been ...
... Alcyonella fungosa the escape of an egg through an opening in the vicinity of the anus ; but , notwithstanding a similar observation already noticed as made by Van Beneden on the marine Laguncula repens , this I feel certain has been ...
Otras ediciones - Ver todas
A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
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 Linnæus 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