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 7
... side of the oesophagus . Let us now suppose this canal to be bent back upon itself towards the side of the ganglion so as to approximate the termination to the origin . Further , let us imagine the digestive tube thus constituted to be ...
... side of the oesophagus . Let us now suppose this canal to be bent back upon itself towards the side of the ganglion so as to approximate the termination to the origin . Further , let us imagine the digestive tube thus constituted to be ...
Página 9
... side , and the great nervous centres placed upon the opposite , he gives to the former region the name of " hæmal , " and to the latter that of " neural , " thus applying to the Mollusca the terms already so happily employed by Owen in ...
... side , and the great nervous centres placed upon the opposite , he gives to the former region the name of " hæmal , " and to the latter that of " neural , " thus applying to the Mollusca the terms already so happily employed by Owen in ...
Página 13
... side . In Frede- ricella a slightly prominent keel is also apparent , but the notch - like transparent space does not here exist . In Cristatella ( Pl . I ) the ectocyst would seem to be entirely absent ; and this genus . therefore ...
... side . In Frede- ricella a slightly prominent keel is also apparent , but the notch - like transparent space does not here exist . In Cristatella ( Pl . I ) the ectocyst would seem to be entirely absent ; and this genus . therefore ...
Página 14
... sides of the cell , they would at once be converted into the ribs of Paludicella ; the fact of the setæ in the ... side . The structure of this body is remark- able ; it consists of a central mass , surrounded by a distinct layer ...
... sides of the cell , they would at once be converted into the ribs of Paludicella ; the fact of the setæ in the ... side . The structure of this body is remark- able ; it consists of a central mass , surrounded by a distinct layer ...
Página 16
... side , with a hol ow valve - like organ ( e ) of very peculiar formation . This organ arches over the mouth , and may be aptly enough compared in shape to the epiglottis of certain mammifers . The cavity in its interior communicates ...
... side , with a hol ow valve - like organ ( e ) of very peculiar formation . This organ arches over the mouth , and may be aptly enough compared in shape to the epiglottis of certain mammifers . The cavity in its interior communicates ...
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