A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 38
The disc in all the species is of a deep brown colour , and would seem to be
composed of a single layer of hexagonal cells , whose external walls in most
cases slightly project beyond the surface of the disc , and thus give to the latter an
...
The disc in all the species is of a deep brown colour , and would seem to be
composed of a single layer of hexagonal cells , whose external walls in most
cases slightly project beyond the surface of the disc , and thus give to the latter an
...
Página 56
This tentaculiferous disc exactly resembled the lophophore and tentacula of a
hippocrepian Polyzoon . In the body of the crescentic disc was placed the mouth ,
over which there arched a valve - like lip , situated exactly as the epistome of a ...
This tentaculiferous disc exactly resembled the lophophore and tentacula of a
hippocrepian Polyzoon . In the body of the crescentic disc was placed the mouth ,
over which there arched a valve - like lip , situated exactly as the epistome of a ...
Página 79
In the middle of the flattened under surface is an oval disc , resembling the foot of
a gasteropodous mollusc ; on this disc , which is contractile , and admits of
frequent change of shape , the colony adheres to neighbouring objects , or
creeps ...
In the middle of the flattened under surface is an oval disc , resembling the foot of
a gasteropodous mollusc ; on this disc , which is contractile , and admits of
frequent change of shape , the colony adheres to neighbouring objects , or
creeps ...
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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 alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British canal cavity cell character cilia closely complete condition connected consists constitutes contained continuous Cristatella crown 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 organs 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
Información bibliográfica
| Título | A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, George James Allman Volumen13 de DE-601)130488305: Ray Society Publications, Ray Society Ray Society, Ray Society Volumen28 de Ray society ... [Publications |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | Universidad de Illinois en Urbana-Champaign |
| Digitalizado | 13 Oct. 2015 |
| Largo | 119 páginas |
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