A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 8
The sort of disc or stage which surrounds the mouth and bears the tentacula , I have called Lophophore . || The Epistome is a peculiar valve - like organ which arches over the mouth in most of the fresh - water genera .
The sort of disc or stage which surrounds the mouth and bears the tentacula , I have called Lophophore . || The Epistome is a peculiar valve - like organ which arches over the mouth in most of the fresh - water genera .
Página 10
Lophophore bilateral ; mouth with an epistome . PHYLACTOLEMATA . * Lophophore orbicular , nearly so ; no epistome . GYMNOLĆMATA . † or Arms of lophophore free or obsolete . " } Arms of lophophore united at the extremities . at ...
Lophophore bilateral ; mouth with an epistome . PHYLACTOLEMATA . * Lophophore orbicular , nearly so ; no epistome . GYMNOLĆMATA . † or Arms of lophophore free or obsolete . " } Arms of lophophore united at the extremities . at ...
Página 12
In the species with bilateral lophophore , the fibres may be seen towards the apertures of the cells ( Pl . V , figs . 5 , 6 , v ) ; but it is generally impossible , in consequence of the increasing opacity of the superjacent structures ...
In the species with bilateral lophophore , the fibres may be seen towards the apertures of the cells ( Pl . V , figs . 5 , 6 , v ) ; but it is generally impossible , in consequence of the increasing opacity of the superjacent structures ...
Página 15
is the only fresh - water representative of the division with orbicular lophophore ( Gymnolćmata ) , presents some peculiarities , and should be examined by itself . * See Schlossberger , Zur näheren Kenntniss der Mushelschalen ...
is the only fresh - water representative of the division with orbicular lophophore ( Gymnolćmata ) , presents some peculiarities , and should be examined by itself . * See Schlossberger , Zur näheren Kenntniss der Mushelschalen ...
Página 16
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 is slightly elevated ...
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 is slightly elevated ...
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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
action adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella described detected disc distinct Dumortier ectocyst edit endocyst entire epistome examined existence extending external extremity fibres fluid Fredericella fresh-water Polyzoa genera genus Gervais gives Hancock Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organ orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens resemblance retraction retractor Rösel seen separated sheath side space species specimens statoblasts stomach stones structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young