A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 6-10 de 26
Página 17
... fluid , in which floats a secondary cell , with yellowish - brown contents . When the animal has been left long without food , the brown matter disappears from the cells , and the stomach becomes colourless . The inner layer of the ...
... fluid , in which floats a secondary cell , with yellowish - brown contents . When the animal has been left long without food , the brown matter disappears from the cells , and the stomach becomes colourless . The inner layer of the ...
Página 18
... fluid . With the exception of the mouth and upper portion of the œsophagus , no part of the alimentary canal is ciliated in the phylactolæmatous fresh - water Polyzoa . In Paludicella however , the stomach in the immediate neighbourhood ...
... fluid . With the exception of the mouth and upper portion of the œsophagus , no part of the alimentary canal is ciliated in the phylactolæmatous fresh - water Polyzoa . In Paludicella however , the stomach in the immediate neighbourhood ...
Página 19
... fluid of their tissues . The tentacular crown of a Polyzoon consists of two portions , namely , first , a sort of stage or disc ( the lophophore ) ( Pl . II , fig . 24 ; IX , fig . 7 ; X , figs . 3 , 4 , k ) which surrounds the mouth ...
... fluid of their tissues . The tentacular crown of a Polyzoon consists of two portions , namely , first , a sort of stage or disc ( the lophophore ) ( Pl . II , fig . 24 ; IX , fig . 7 ; X , figs . 3 , 4 , k ) which surrounds the mouth ...
Página 20
... fluid , and often presenting a bright nucleus . Some of those cells which lie upon the back of the tentacle become in certain genera enlarged , giving a vesicular appearance to the organ ; this is particularly evident in Cristatella ...
... fluid , and often presenting a bright nucleus . Some of those cells which lie upon the back of the tentacle become in certain genera enlarged , giving a vesicular appearance to the organ ; this is particularly evident in Cristatella ...
Página 22
... fluid , in which float numerous particles of very irre- gular form and size . In this fluid may be observed a constant rotatory motion , rendered apparent by the floating corpuscles as they are whirled away under the influence of the ...
... fluid , in which float numerous particles of very irre- gular form and size . In this fluid may be observed a constant rotatory motion , rendered apparent by the floating corpuscles as they are whirled away under the influence 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 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