A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Volumen28Ray Society, 1856 - 119 páginas |
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Página 50
... thoracic chamber formed on the ascidian type , but in consequence of the non - development of a branchial sac , or of any form of gill , this chamber is not divided into a branchial and cloacal portion , and has only a single external ...
... thoracic chamber formed on the ascidian type , but in consequence of the non - development of a branchial sac , or of any form of gill , this chamber is not divided into a branchial and cloacal portion , and has only a single external ...
Página 52
... cavity are at first in close apposition with those of the thoracic chamber , which completely encloses it , so that the two cavities at this stage appear as one , being exactly co - extensive ; we soon perceive , however , that the ...
... cavity are at first in close apposition with those of the thoracic chamber , which completely encloses it , so that the two cavities at this stage appear as one , being exactly co - extensive ; we soon perceive , however , that the ...
Página 53
... thoracic chamber of the Ascidian ; and the lophophore , which represents the thoracic sinus of the branchial sac of the Ascidian , becomes separated from it just as the branchial sac separates itself from the walls of the thoracic ...
... thoracic chamber of the Ascidian ; and the lophophore , which represents the thoracic sinus of the branchial sac of the Ascidian , becomes separated from it just as the branchial sac separates itself from the walls of the thoracic ...
Otras ediciones - Ver todas
A Monograph of the Fresh-Water Polyzoa, Including All the Known Species ... George James Allman Sin vista previa disponible - 2009 |
A Monograph of the Fresh-water Polyzoa: Including All the Known Species ... George James 1812-1898 Allman Sin vista previa disponible - 2021 |
A Monograph of the Fresh-Water Polyzoa: Including All the Known Species ... George James Allman Sin vista previa disponible - 2016 |
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 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 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