A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28Ray Society, 1856 - 119 páginas |
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Página 43
... Ascidian has its repre- sentative in the pharynx of the Polyzoon , and that the rudimentary tentacula at the orifice of this sac are homologous with the tentacula of the Polyzoon . Under the other head it is asserted that the ...
... Ascidian has its repre- sentative in the pharynx of the Polyzoon , and that the rudimentary tentacula at the orifice of this sac are homologous with the tentacula of the Polyzoon . Under the other head it is asserted that the ...
Página 44
... Ascidian must be considered as becoming extinct in the tentacular crown of the Polyzoon . Now this view is certainly untenable . I have in another place ‡ endeavoured to show that while the respiratory sac of the Ascidian has ...
... Ascidian must be considered as becoming extinct in the tentacular crown of the Polyzoon . Now this view is certainly untenable . I have in another place ‡ endeavoured to show that while the respiratory sac of the Ascidian has ...
Página 51
... Ascidian . " ‡ Now , if the above be an exact statement of the true morphology of the Ascidian , it is inconsistent with the views attempted to be demonstrated in the present paper . After a very careful consideration , however , I have ...
... Ascidian . " ‡ Now , if the above be an exact statement of the true morphology of the Ascidian , it is inconsistent with the views attempted to be demonstrated in the present paper . After a very careful consideration , however , I have ...
Otras ediciones - Ver todas
A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
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 longitudinal 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