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 25
... consist of two fasciculi ( Pl . IV , fig . 4 ; V , fig . 5 ; IX , fig . 7 , p ) , which arise along with the set just described , and passing forward in company with these , separate from them at some distance below the crown , and ...
... consist of two fasciculi ( Pl . IV , fig . 4 ; V , fig . 5 ; IX , fig . 7 , p ) , which arise along with the set just described , and passing forward in company with these , separate from them at some distance below the crown , and ...
Página 26
... consist of numerous short bands ( Pl . IV , fig . 4 ; V , figs . 5 , 6 ; IX , fig . 7 , 8 ) , which arise all round from the inner surface of the endocyst , commencing close to the line of invagi- nation , and extending for some ...
... consist of numerous short bands ( Pl . IV , fig . 4 ; V , figs . 5 , 6 ; IX , fig . 7 , 8 ) , which arise all round from the inner surface of the endocyst , commencing close to the line of invagi- nation , and extending for some ...
Página 28
... consists of a set of fibres ( Pl . X , fig . 3 , u ) which run transversely round the invaginated tunic . I have not suc- ceeded in dividing it into an inferior and superior set , as described by Mr. Hancock . Its action closes the ...
... consists of a set of fibres ( Pl . X , fig . 3 , u ) which run transversely round the invaginated tunic . I have not suc- ceeded in dividing it into an inferior and superior set , as described by Mr. Hancock . Its action closes the ...
Página 29
... consist of a membrane doubled into itself , is nothing else than the imperfectly evaginated tentacular sheath . It may be witnessed during the act of protrusion in Plumatella and other genera ; but in these it is a mere temporary ...
... consist of a membrane doubled into itself , is nothing else than the imperfectly evaginated tentacular sheath . It may be witnessed during the act of protrusion in Plumatella and other genera ; but in these it is a mere temporary ...
Página 32
... consist , at first , of nothing more than a well - defined spherical nucleus , and this is subsequently transformed into a spermatozoal filament , which finally escapes by the rupture of the containing cells ( figs . 17-23 ) . The ...
... consist , at first , of nothing more than a well - defined spherical nucleus , and this is subsequently transformed into a spermatozoal filament , which finally escapes by the rupture of the containing cells ( figs . 17-23 ) . 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