A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
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Página 4
... distinct types of animal organization ; and the attention of naturalists was now chiefly directed to the comparison of external characters for the determination of species , and as the grounds of classification . Numerous systems were ...
... distinct types of animal organization ; and the attention of naturalists was now chiefly directed to the comparison of external characters for the determination of species , and as the grounds of classification . Numerous systems were ...
Página 5
... distinct name which no longer assumed their connection with the polypes . The name thus proposed by Thompson for the group whose structure he had so well investigated was " Polyzoa . " Residing in a remote part of Ireland , and in a ...
... distinct name which no longer assumed their connection with the polypes . The name thus proposed by Thompson for the group whose structure he had so well investigated was " Polyzoa . " Residing in a remote part of Ireland , and in a ...
Página 6
... distinct peculiarities , through which the Polypes manifested an affinity with the Tunicata . It is not easy to say to whom we are indebted for the first absolute withdrawal of the Polyzoa from the Radiate sub - kingdom , and their ...
... distinct peculiarities , through which the Polypes manifested an affinity with the Tunicata . It is not easy to say to whom we are indebted for the first absolute withdrawal of the Polyzoa from the Radiate sub - kingdom , and their ...
Página 8
... distinct from that of the Polypes proper , necessitates a change in the terminology employed in their description . On these grounds I have ventured to substitute some new terms for those previously used , while our increased knowledge ...
... distinct from that of the Polypes proper , necessitates a change in the terminology employed in their description . On these grounds I have ventured to substitute some new terms for those previously used , while our increased knowledge ...
Página 11
... distinct mem- branes , which must be carefully distinguished from one another — an internal , the endocyst , which is always soft , transparent , and contractile ; and an external , the ectocyst , which varies greatly in character in ...
... distinct mem- branes , which must be carefully distinguished from one another — an internal , the endocyst , which is always soft , transparent , and contractile ; and an external , the ectocyst , which varies greatly in character in ...
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