A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 20
... extending forwards for about one third of their length , and constituting a cup . This membrane passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus binding together the two tentacula which ...
... extending forwards for about one third of their length , and constituting a cup . This membrane passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus binding together the two tentacula which ...
Página 21
... extending over nearly the whole of the internal surface of the stomach , is here confined to the anterior portion of this sac , in the space between the cardiac and pyloric orifices , where it constitutes a dark brown glandular mass ...
... extending over nearly the whole of the internal surface of the stomach , is here confined to the anterior portion of this sac , in the space between the cardiac and pyloric orifices , where it constitutes a dark brown glandular mass ...
Página 26
... extending for some distance backwards . From this origin they pass transversely inwards , and are inserted into the opposed surface of the invaginated endocyst . Their action will dilate the invaginated endocyst , and assist in keeping ...
... extending for some distance backwards . From this origin they pass transversely inwards , and are inserted into the opposed surface of the invaginated endocyst . Their action will dilate the invaginated endocyst , and assist in keeping ...
Página 27
... extending for some distance down the invaginated tunic . These four lines of insertion are placed at nearly equal distances from one another , and thus cause the orifice and invaginated tube to assume a regular quadrilateral figure ...
... extending for some distance down the invaginated tunic . These four lines of insertion are placed at nearly equal distances from one another , and thus cause the orifice and invaginated tube to assume a regular quadrilateral figure ...
Página 34
... extending along the arms , which at the same time acquire increased proportional length ; the tentacula gradually elongate themselves and acquire cilia . At the same time , the alimentary canal , represented at first by a single small ...
... extending along the arms , which at the same time acquire increased proportional length ; the tentacula gradually elongate themselves and acquire cilia . At the same time , the alimentary canal , represented at first by a single small ...
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