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 37
... ; in these two genera , however , it is furnished , when mature , with hooked spines , which , at least in Cristatella , spring alternately from the two sides just within the annulus ( Pl . I , figs . 4-7 ) , GEMMATION . 37.
... ; in these two genera , however , it is furnished , when mature , with hooked spines , which , at least in Cristatella , spring alternately from the two sides just within the annulus ( Pl . I , figs . 4-7 ) , GEMMATION . 37.
Página 38
... annulus is also composed of cells , which here occur in several layers ; these cells are also for the most part larger than those of the disc and of a different colour ; they are filled with air , giving to the annulus a light spongy ...
... annulus is also composed of cells , which here occur in several layers ; these cells are also for the most part larger than those of the disc and of a different colour ; they are filled with air , giving to the annulus a light spongy ...
Página 39
George James Allman. and the annulus is composed of large hexagonal cells filled with air . If the whole be now crushed , under the microscope , multitudes of cells will escape , all filled with minute , strongly refracting corpuscles ...
George James Allman. and the annulus is composed of large hexagonal cells filled with air . If the whole be now crushed , under the microscope , multitudes of cells will escape , all filled with minute , strongly refracting corpuscles ...
Página 40
... annulus which overlaps a considerable portion of the disc ( Pl . IV , figs . 7-9 ; VII , figs . 7 , 8 ) . But , besides these bodies , others ( Pl . IV , fig . 10 ; VII , fig . 9 ) may be observed which never lie loose in the cell , but ...
... annulus which overlaps a considerable portion of the disc ( Pl . IV , figs . 7-9 ; VII , figs . 7 , 8 ) . But , besides these bodies , others ( Pl . IV , fig . 10 ; VII , fig . 9 ) may be observed which never lie loose in the cell , but ...
Página 67
... annulus with which they are surrounded , but sets this appearance down as the result of an optical deception , and he incorrectly describes their curious hooked spines as , for the most part , growing from the extreme margin ; while he ...
... annulus with which they are surrounded , but sets this appearance down as the result of an optical deception , and he incorrectly describes their curious hooked spines as , for the most part , growing from the extreme margin ; while he ...
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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 character cilia cœnćcium 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 hćmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnćus 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 ŕ Panache polypide Polyzoon portion 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