A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Resultados 6-10 de 14
Página 21
... layer , and forms the im- mediate walls of the tubular cavity . Nervous filaments , and certain bands , probably mus- cular , to be presently described , may be traced as far as the root of each tentacle , and doubtless also enter into ...
... layer , and forms the im- mediate walls of the tubular cavity . Nervous filaments , and certain bands , probably mus- cular , to be presently described , may be traced as far as the root of each tentacle , and doubtless also enter into ...
Página 33
... layer ( Pl . XI , figs . 26 , 27 ) . It presents a large germinal vesicle , and a very distinct germinal spot . After a time the germinal vesicle and germinal spot disappear , and the vitellus undergoes segmentation , and after the ...
... layer ( Pl . XI , figs . 26 , 27 ) . It presents a large germinal vesicle , and a very distinct germinal spot . After a time the germinal vesicle and germinal spot disappear , and the vitellus undergoes segmentation , and after the ...
Página 37
... layer . It now increases in size , and a clear , oval space becomes apparent towards one side of it ( fig . 11 ) . This space soon acquires a triangular figure ( fig . 12 ) , and it is now evident that the lophophore has begun to ...
... layer . It now increases in size , and a clear , oval space becomes apparent towards one side of it ( fig . 11 ) . This space soon acquires a triangular figure ( fig . 12 ) , and it is now evident that the lophophore has begun to ...
Página 38
... layer of hexagonal cells , whose external walls in most cases slightly project beyond the surface of the disc , and thus give to the latter an elegantly mammillated condition . In some cases , however , the cellular condition of one or ...
... layer of hexagonal cells , whose external walls in most cases slightly project beyond the surface of the disc , and thus give to the latter an elegantly mammillated condition . In some cases , however , the cellular condition of one or ...
Página 82
... layer having a faint roseate hue , from the red colouring in the vicinity of the mouth of the polypi ; then suc- ceeds a layer of a dirty - yellowish colour , arising from the stomachs of the animals ; beneath which are numerous opaque ...
... layer having a faint roseate hue , from the red colouring in the vicinity of the mouth of the polypi ; then suc- ceeds a layer of a dirty - yellowish colour , arising from the stomachs of the animals ; beneath which are numerous opaque ...
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