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 16
... consists in an alternate elevation and depression of the organ . The elevation is effected by distinct muscular fibres ( n ) , which are visible through the transparent walls , and will be afterwards more particularly described , while ...
... consists in an alternate elevation and depression of the organ . The elevation is effected by distinct muscular fibres ( n ) , which are visible through the transparent walls , and will be afterwards more particularly described , while ...
Página 19
... consists of two portions , namely , first , a sort of stage or disc ( the lophophore ) ( Pl . II , fig . 24 ; IX , fig . 7 ; X , figs . 3 , 4 , k ) which surrounds the mouth ; and secondly , a series of tentacula ( 1 ) which are borne ...
... consists of two portions , namely , first , a sort of stage or disc ( the lophophore ) ( Pl . II , fig . 24 ; IX , fig . 7 ; X , figs . 3 , 4 , k ) which surrounds the mouth ; and secondly , a series of tentacula ( 1 ) which are borne ...
Página 20
... 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 appearance to the ...
... 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 appearance to the ...
Página 23
... consists mainly of water which has obtained entrance from without , it then corresponds to a true aquiferous system subservient to a respiratory function . But it also without doubt receives certain products of digestion which had ...
... consists mainly of water which has obtained entrance from without , it then corresponds to a true aquiferous system subservient to a respiratory function . But it also without doubt receives certain products of digestion which had ...
Página 24
... consist of two fasciculi ( Pl . IV , fig . 4 ; V , fig . 5 ; IX , fig . 7 , n ) , which arise far back from the inner surface of the endocyst , and thence pass forwards , one along each side of the alimentary tract , to be inserted into ...
... consist of two fasciculi ( Pl . IV , fig . 4 ; V , fig . 5 ; IX , fig . 7 , n ) , which arise far back from the inner surface of the endocyst , and thence pass forwards , one along each side of the alimentary tract , to be inserted into ...
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