A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28Ray Society, 1856 - 119 páginas |
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Página 16
... mouth ( Pl . II , fig . 24 , d ) is a simple edentulous orifice of a circular or slightly crescentic form , placed in the centre of the body of the lophophore , and consequently occupying the bottom of the tentacular crater . Its margin ...
... mouth ( Pl . II , fig . 24 , d ) is a simple edentulous orifice of a circular or slightly crescentic form , placed in the centre of the body of the lophophore , and consequently occupying the bottom of the tentacular crater . Its margin ...
Página 21
... mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres , which may be seen extend- ing from the ...
... mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres , which may be seen extend- ing from the ...
Página 56
... mouth , over which there arched a valve - like lip , situated exactly as the epistome of a Polyzoon . The mouth led into an oesophagus which could be easily traced backwards within the perfectly transparent walls of the stem , until it ...
... mouth , over which there arched a valve - like lip , situated exactly as the epistome of a Polyzoon . The mouth led into an oesophagus which could be easily traced backwards within the perfectly transparent walls of the stem , until it ...
Otras ediciones - Ver todas
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 longitudinal 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