A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 1-5 de 28
Página 12
... minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the cell - wall . For reasons to be presently mentioned , it ...
... minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the cell - wall . For reasons to be presently mentioned , it ...
Página 13
... minute oval brilliant corpuscles were seen to have been developed in the endocyst throughout its whole extent . They were not scattered at random through this membrane , but were contained in the interior of a system of tubes which ...
... minute oval brilliant corpuscles were seen to have been developed in the endocyst throughout its whole extent . They were not scattered at random through this membrane , but were contained in the interior of a system of tubes which ...
Página 18
... minute organic bodies may be observed to be whirled along in the vortices caused by the action of the tentacular cilia , and conveyed to the mouth , where many of them are at once seized and swallowed , and others rejected . The food ...
... minute organic bodies may be observed to be whirled along in the vortices caused by the action of the tentacular cilia , and conveyed to the mouth , where many of them are at once seized and swallowed , and others rejected . The food ...
Página 21
... minute cavity , which looks as if it were cut off from the rest of the tube , may be very plainly seen in the extremity of each tentacle ; this condition would also seem to exist in other genera , but it is nowhere so well marked as in ...
... minute cavity , which looks as if it were cut off from the rest of the tube , may be very plainly seen in the extremity of each tentacle ; this condition would also seem to exist in other genera , but it is nowhere so well marked as in ...
Página 22
... minute tubular cavity clothed with actively vibrating cilia . I was unable to follow this organ through its whole extent , or determine its exact relations , as it appeared to lose itself beneath the opacity of the surrounding ...
... minute tubular cavity clothed with actively vibrating cilia . I was unable to follow this organ through its whole extent , or determine its exact relations , as it appeared to lose itself beneath the opacity of the surrounding ...
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