A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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... external agencies . It is possible that some of the forms here described as distinct species may afterwards prove to be only varieties of one and the same specific group ; but as they all possess a real existence , and are truly ...
... external agencies . It is possible that some of the forms here described as distinct species may afterwards prove to be only varieties of one and the same specific group ; but as they all possess a real existence , and are truly ...
Página 4
... external form , there were still two totally 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 ...
... external form , there were still two totally 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 ...
Página 7
... external to the sac . Let us still further suppose the alimentary tube , by means of a system of muscles , to admit of being retracted or protruded according to the will of the animal , the retraction being accompanied by an ...
... external to the sac . Let us still further suppose the alimentary tube , by means of a system of muscles , to admit of being retracted or protruded according to the will of the animal , the retraction being accompanied by an ...
Página 8
... external I have given the name of Ectocyst , and to the internal that of Endocyst . § The sort of disc or stage which surrounds the mouth and bears the tentacula , I have called Lophophore . || The Epistome is a peculiar valve - like ...
... external I have given the name of Ectocyst , and to the internal that of Endocyst . § The sort of disc or stage which surrounds the mouth and bears the tentacula , I have called Lophophore . || The Epistome is a peculiar valve - like ...
Página 11
... external , the ectocyst , which varies greatly in character in the different genera . The endocyst ( Pl . III , fig ... externally , while the polypide is thus suspended in the midst of the fluid with which these chambers are filled . If ...
... external , the ectocyst , which varies greatly in character in the different genera . The endocyst ( Pl . III , fig ... externally , while the polypide is thus suspended in the midst of the fluid with which these chambers are filled . If ...
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