A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 1-5 de 23
Página
... constitute an exceedingly natural group , and possess great uniformity of structure , and as the fresh - water species afford fine typical examples of the class , a work devoted to the anatomy of these will apply in all essential points ...
... constitute an exceedingly natural group , and possess great uniformity of structure , and as the fresh - water species afford fine typical examples of the class , a work devoted to the anatomy of these will apply in all essential points ...
Página 10
... constitute in reality an artificial group . Being essentially characterised by the possession of a crescentic lophophore , they necessarily exclude not only Pedicellina , but even Fredericella , whose relations with the species ...
... constitute in reality an artificial group . Being essentially characterised by the possession of a crescentic lophophore , they necessarily exclude not only Pedicellina , but even Fredericella , whose relations with the species ...
Página 11
... constitutes essen- tially an assemblage of little cells or chambers , of very various form , organically connected with one another . Each chamber lodges a polypide , and its cavity is either shut off from those of the neighbouring ...
... constitutes essen- tially an assemblage of little cells or chambers , of very various form , organically connected with one another . Each chamber lodges a polypide , and its cavity is either shut off from those of the neighbouring ...
Página 12
... constitute an irregular network in its substance . Besides the structure now described , peculiar fibres ( Pl . II , fig ... constitutes the tentacular sheath which encloses and protects the tentacula during the retracted state of the ...
... constitute an irregular network in its substance . Besides the structure now described , peculiar fibres ( Pl . II , fig ... constitutes the tentacular sheath which encloses and protects the tentacula during the retracted state of the ...
Página 13
... constitutes the whole of the conccium , it presents below a flattened disc , which closely resembles the foot of a gasteropodous mollusc , and on which this singular colony creeps about on the stems and leaves of aquatic plants ...
... constitutes the whole of the conccium , it presents below a flattened disc , which closely resembles the foot of a gasteropodous mollusc , and on which this singular colony creeps about on the stems and leaves of aquatic plants ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus 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