A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Página 7
... ciliated tentacula , and to have a single nervous ganglion situated on one side of the œsophagus . Let us now suppose this canal to be bent back upon itself towards the side of the ganglion so as to approximate the termination to the ...
... ciliated tentacula , and to have a single nervous ganglion situated on one side of the œsophagus . Let us now suppose this canal to be bent back upon itself towards the side of the ganglion so as to approximate the termination to the ...
Página 16
... cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may be observed , when the polypide is exserted from its cell , to be in a constant motion , which consists in an ...
... cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may be observed , when the polypide is exserted from its cell , to be in a constant motion , which consists in an ...
Página 18
... cilia , but I could detect no appearance of cilia further than a short distance down this tube . The structure of the intestine closely resembles that of the oesophagus ; vibratile cilia however , are altogether absent . In Cristatella ...
... cilia , but I could detect no appearance of cilia further than a short distance down this tube . The structure of the intestine closely resembles that of the oesophagus ; vibratile cilia however , are altogether absent . In Cristatella ...
Página 19
... cilia . I have had an oppor- * The structure of Pedicellina has been hitherto entirely misunderstood . tunity of carefully examining this Polyzoon , and as it is constructed on a plan quite peculiar , and may tend to throw light on the ...
... cilia . I have had an oppor- * The structure of Pedicellina has been hitherto entirely misunderstood . tunity of carefully examining this Polyzoon , and as it is constructed on a plan quite peculiar , and may tend to throw light on the ...
Página 20
... cilia , arranged in a single series , and vibrating towards the remote extremity of the tentacle upon one side , and towards the base on the other . Two very distinct layers ( Pl . IX , fig . 5 ) enter into the structure of the ...
... cilia , arranged in a single series , and vibrating towards the remote extremity of the tentacle upon one side , and towards the base on the other . Two very distinct layers ( Pl . IX , fig . 5 ) enter into the structure of the ...
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