A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 44
It must , moreover , be borne in mind , that the transverse bars open into two great
longitudinal canals , the “ branchial ” and “ thoracic sinuses ” of Milne - Edwards ,
one placed upon the neural , and the other upon the hæmal side of the sac ...
It must , moreover , be borne in mind , that the transverse bars open into two great
longitudinal canals , the “ branchial ” and “ thoracic sinuses ” of Milne - Edwards ,
one placed upon the neural , and the other upon the hæmal side of the sac ...
Página 45
Now it does not need much assistance from the imagination to see in the great
branchial sinus of Clavelina , a representative of the lophophore of Plumatella ,
while the transverse bars which pass off at either side from this sinus , and are ...
Now it does not need much assistance from the imagination to see in the great
branchial sinus of Clavelina , a representative of the lophophore of Plumatella ,
while the transverse bars which pass off at either side from this sinus , and are ...
Página 46
This correspondence will be rendered more obvious by imagining the branchial
sinus to be depressed towards the neural side of the Ascidian , by a rotation
round its oral extremity through an angle of 90 ° in a vertical plane passing
through ...
This correspondence will be rendered more obvious by imagining the branchial
sinus to be depressed towards the neural side of the Ascidian , by a rotation
round its oral extremity through an angle of 90 ° in a vertical plane passing
through ...
Página 47
Now nearly all the changes which we have thus hypothetically supposed to take
place in Clavelina , in order to convert its branchial sac into the tentacular crown
of Plumatella , do actually occur in other genera of Tunicata , some in one , and ...
Now nearly all the changes which we have thus hypothetically supposed to take
place in Clavelina , in order to convert its branchial sac into the tentacular crown
of Plumatella , do actually occur in other genera of Tunicata , some in one , and ...
Página 48
The main tube , with its lateral pinnæ , thus constitutes an imperfect diaphragm ,
which divides the great thoracic chamber into an anterior or branchial portion ,
and a posterior or cloacal portion . Now the main tube may be obviously
compared ...
The main tube , with its lateral pinnæ , thus constitutes an imperfect diaphragm ,
which divides the great thoracic chamber into an anterior or branchial portion ,
and a posterior or cloacal portion . Now the main tube may be obviously
compared ...
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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 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
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 | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
| Largo | 119 páginas |
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