A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
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Página 1
... masses , or hard , calcareous , branchy growths , like diminutive trees ; and now again presenting the appearance of the most delicate and exquisitely formed sea - weed or moss , offering , even to the unassisted eye , in the endless ...
... masses , or hard , calcareous , branchy growths , like diminutive trees ; and now again presenting the appearance of the most delicate and exquisitely formed sea - weed or moss , offering , even to the unassisted eye , in the endless ...
Página 3
... mass , from which protruded numerous polypoid bodies , each characterised by the possession of an elegant crown of tentacula borne on the margin of a crescent - shaped disc . This beautiful tentacular plume is one of its most striking ...
... mass , from which protruded numerous polypoid bodies , each characterised by the possession of an elegant crown of tentacula borne on the margin of a crescent - shaped disc . This beautiful tentacular plume is one of its most striking ...
Página 12
... mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the ...
... mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the ...
Página 14
... mass , surrounded by a distinct layer of somewhat elongated cellules placed perpendicularly to its surface . The body which thus closes up the centre of the annular septum has , without doubt , some office to perform besides that of ...
... mass , surrounded by a distinct layer of somewhat elongated cellules placed perpendicularly to its surface . The body which thus closes up the centre of the annular septum has , without doubt , some office to perform besides that of ...
Página 18
... mass , and retains it for a moment by an hour - glass restriction separate from the remainder , and then powerfully contracting on it , forces it back among the other contents of the stomach . All this time the food is becoming imbued ...
... mass , and retains it for a moment by an hour - glass restriction separate from the remainder , and then powerfully contracting on it , forces it back among the other contents of the stomach . All this time the food is becoming imbued ...
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