A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Both these genera , each consisting of a single species , are confined to the
United States of America , where they were recently discovered by Dr. Leidy ,
who has given us a description of them , which , however , is purely zoographical
.
Both these genera , each consisting of a single species , are confined to the
United States of America , where they were recently discovered by Dr. Leidy ,
who has given us a description of them , which , however , is purely zoographical
.
Página 7
Retractor muscle . Let us imagine an alimentary canal , consisting of esophagus ,
stomach , and intestine , to be furnished at its origin with long ciliated tentacula ,
and to have a single nervous ganglion situated on one side of the æsophagus .
Retractor muscle . Let us imagine an alimentary canal , consisting of esophagus ,
stomach , and intestine , to be furnished at its origin with long ciliated tentacula ,
and to have a single nervous ganglion situated on one side of the æsophagus .
Página 11
It must not , however , be supposed that there is here any proper orifice , the
retraction and exsertion consisting merely in an invagination and evagination of
the anterior part of the cell . The cænæcium , in every case , except in Cristatella ,
is ...
It must not , however , be supposed that there is here any proper orifice , the
retraction and exsertion consisting merely in an invagination and evagination of
the anterior part of the cell . The cænæcium , in every case , except in Cristatella ,
is ...
Página 12
consist almost entirely of bodies exactly resembling the nuclei of the cells ; some
of these intercellular nuclei contain two nucleoli , and seem to be undergoing
division , while round others a young cell may be seen in various stages of ...
consist almost entirely of bodies exactly resembling the nuclei of the cells ; some
of these intercellular nuclei contain two nucleoli , and seem to be undergoing
division , while round others a young cell may be seen in various stages of ...
Página 14
This gelatinous - looking investment is , however , a true ectocyst ; it consists of a
membranous tunic of great delicacy , apparently enclosing a perfectly transparent
and colourless fluid , probably in the meshes of a sort of areolar tissue .
This gelatinous - looking investment is , however , a true ectocyst ; it consists of a
membranous tunic of great delicacy , apparently enclosing a perfectly transparent
and colourless fluid , probably in the meshes of a sort of areolar tissue .
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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
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cænæcium canal cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding 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 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 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 | Biblioteca Nacional de Austria |
| Digitalizado | 12 Mayo 2011 |
| Largo | 119 páginas |
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