A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Resultados 6-10 de 26
Página 14
These ribs I look upon as the true homologue of the sele which crown the cell in
Bowerbankia and other ctenostomatous Polyzoa ; if these setæ were reduced in
number to four , and instead of being free were attached along their entire length
...
These ribs I look upon as the true homologue of the sele which crown the cell in
Bowerbankia and other ctenostomatous Polyzoa ; if these setæ were reduced in
number to four , and instead of being free were attached along their entire length
...
Página 18
The entire tract in all the genera examined is highly irritable , the presence of
alimentary matter stimulating it to rapid and vigorous contraction . The whole
course of the alimentary matter , from the moment of its prehension to its final
ejection ...
The entire tract in all the genera examined is highly irritable , the presence of
alimentary matter stimulating it to rapid and vigorous contraction . The whole
course of the alimentary matter , from the moment of its prehension to its final
ejection ...
Página 19
... 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 Cristatella , Lophopus , Plumatella , and ...
... 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 Cristatella , Lophopus , Plumatella , and ...
Página 21
In all the fresh - water genera , with the exception of Paludicella , and possibly of
Urnatella , the entire plume of tentacula is surrounded at its base by an
exceedingly delicate water Phylactolæmata is probably united . In order to
understand this ...
In all the fresh - water genera , with the exception of Paludicella , and possibly of
Urnatella , the entire plume of tentacula is surrounded at its base by an
exceedingly delicate water Phylactolæmata is probably united . In order to
understand this ...
Página 30
A muscle may , indeed , here be viewed as a beautiful dissection far surpassing
the most refined preparation of the dissecting needle , for it is composed of a
bundle of elementary fibres , totally separate from one another through their
entire ...
A muscle may , indeed , here be viewed as a beautiful dissection far surpassing
the most refined preparation of the dissecting needle , for it is composed of a
bundle of elementary fibres , totally separate from one another through their
entire ...
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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 admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cænæcium 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