A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 3
It consisted of a lobed jelly - like mass , from which protruded numerous polypoid
bodies , each characterised by the possession of an elegant crown of tentacula
borne on the margin of a crescent - shaped disc . This beautiful tentacular plume
...
It consisted of a lobed jelly - like mass , from which protruded numerous polypoid
bodies , each characterised by the possession of an elegant crown of tentacula
borne on the margin of a crescent - shaped disc . This beautiful tentacular plume
...
Página 16
Its margin is slightly elevated , and is continuous on the neural side , with a holow
valve - like organ ( e ) of very peculiar formation . This organ arches over the
mouth , and may be aptly enough compared in shape to the epiglottis of certain ...
Its margin is slightly elevated , and is continuous on the neural side , with a holow
valve - like organ ( e ) of very peculiar formation . This organ arches over the
mouth , and may be aptly enough compared in shape to the epiglottis of certain ...
Página 17
5 ) is a perfectly circular orifice , with slightly projectile margin , and is totally
destitute of the valve - like appendage which , unless Urnatella should prove an
exception , is found in all the other fresh - water species . The upper part of the ...
5 ) is a perfectly circular orifice , with slightly projectile margin , and is totally
destitute of the valve - like appendage which , unless Urnatella should prove an
exception , is found in all the other fresh - water species . The upper part of the ...
Página 19
3 , 4 , k ) which surrounds the mouth ; and secondly , a series of tentacula ( l )
which are borne upon the margin of the lophophore . The lophophore is
throughout almost the entire class of an orbicular figure ; but in the fresh - water
genera ...
3 , 4 , k ) which surrounds the mouth ; and secondly , a series of tentacula ( l )
which are borne upon the margin of the lophophore . The lophophore is
throughout almost the entire class of an orbicular figure ; but in the fresh - water
genera ...
Página 20
Fig 4. Front view of lophophore and contiguous parts . Ectocyst . 6. Endocyst . C.
Invaginated portion of endocyst adherent to the bases of the tentacula and
entering into the formation of the cup . d . Muscular fibres surrounding the margin
of the ...
Fig 4. Front view of lophophore and contiguous parts . Ectocyst . 6. Endocyst . C.
Invaginated portion of endocyst adherent to the bases of the tentacula and
entering into the formation of the cup . d . Muscular fibres surrounding the margin
of the ...
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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 ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cćnćcium 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 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 represented 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