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 10
... extremities . } PEDICELLINEA ‡ ( marine ) . URNATELLEA ( fresh - water ) . Lophophore orbicular , or nearly so ; no epistome . GYMNOLEMATA . † Polypide only partially re- tractile ? Polypide completely retractile ; evagination of ...
... extremities . } PEDICELLINEA ‡ ( marine ) . URNATELLEA ( fresh - water ) . Lophophore orbicular , or nearly so ; no epistome . GYMNOLEMATA . † Polypide only partially re- tractile ? Polypide completely retractile ; evagination of ...
Página 12
... extremities in con- nection with one another . Each of these cells is then also seen to contain a nucleus with nucleolus ( Pl . II , figs . 11 , 12 ) . We have seen that in all the fresh - water genera a portion of the endocyst remains ...
... extremities in con- nection with one another . Each of these cells is then also seen to contain a nucleus with nucleolus ( Pl . II , figs . 11 , 12 ) . We have seen that in all the fresh - water genera a portion of the endocyst remains ...
Página 16
... extremity immediately receives the œsophagus , while by the other it is continuous with the remaining portion of the stomach ; it may be called the cardiac cavity of the stomach . The second division ( g ) forms the greater portion of ...
... extremity immediately receives the œsophagus , while by the other it is continuous with the remaining portion of the stomach ; it may be called the cardiac cavity of the stomach . The second division ( g ) forms the greater portion of ...
Página 17
... extremity , and presents here a well - marked constriction ; in extreme retraction of the polypide it is bent back upon the rest of the stomach . The great cavity ( g ) of the stomach is of a nearly cylindrical figure ; from its upper ...
... extremity , and presents here a well - marked constriction ; in extreme retraction of the polypide it is bent back upon the rest of the stomach . The great cavity ( g ) of the stomach is of a nearly cylindrical figure ; from its upper ...
Página 18
... extremity of this tube . After continuing here for a while in a state of rest , and probably yielding to the absorbent tissues its remaining nutritious elements , portions in the form of roundish pellets 18 DIGESTIVE SYSTEM .
... extremity of this tube . After continuing here for a while in a state of rest , and probably yielding to the absorbent tissues its remaining nutritious elements , portions in the form of roundish pellets 18 DIGESTIVE SYSTEM .
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