A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 9
... I shall call that region of a Polyzoon on which the nervous ganglion lies the " neural , " and the opposite region , that , namely , which corresponds to the part of an Ascidian which contains the heart , the " hæmal .
... I shall call that region of a Polyzoon on which the nervous ganglion lies the " neural , " and the opposite region , that , namely , which corresponds to the part of an Ascidian which contains the heart , the " hæmal .
Página 10
+ Gymnolæmata ( from yvuvos , naked , and λačua , in allusion to the absence of an epistome ) corresponds to part of the Infundibulata of Gervais . For the structure of Pedicellina , see Note , p . 19 . The location of Urnatella among ...
+ Gymnolæmata ( from yvuvos , naked , and λačua , in allusion to the absence of an epistome ) corresponds to part of the Infundibulata of Gervais . For the structure of Pedicellina , see Note , p . 19 . The location of Urnatella among ...
Página 17
It soon contracts into a long narrow tube , which leads to an oval sac ( g ) corresponding to the cardiac cavity of the stomach in the other fresh - water Polyzoa , and to the gizzard in certain marine species .
It soon contracts into a long narrow tube , which leads to an oval sac ( g ) corresponding to the cardiac cavity of the stomach in the other fresh - water Polyzoa , and to the gizzard in certain marine species .
Página 18
These correspond to the middle and external layers of the stomach , the former being here largely developed ( A ' ) , while ... In Cristatella , the cells of the internal layer corresponding to the middle layer of the stomach are large ...
These correspond to the middle and external layers of the stomach , the former being here largely developed ( A ' ) , while ... In Cristatella , the cells of the internal layer corresponding to the middle layer of the stomach are large ...
Página 19
... corresponds to the side of the rectum , is extended into two long triangular lobes or arms , so as to cause the ... the side corresponding to the arms of the crescent being slightly prolonged , while the bilaterality is rendered ...
... corresponds to the side of the rectum , is extended into two long triangular lobes or arms , so as to cause the ... the side corresponding to the arms of the crescent being slightly prolonged , while the bilaterality is rendered ...
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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
action adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British 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 Hancock 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 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