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 40
Página 10
... extremities . at } Polypide only partially retractile ? Polypide completely retractile ; evagination of tentacular . sheath imperfect . Polypide completely retractile ; evagination perfect ; orifice of cell destitute of moveable ...
... extremities . at } Polypide only partially retractile ? Polypide completely retractile ; evagination of tentacular . sheath imperfect . Polypide completely retractile ; evagination perfect ; orifice of cell destitute of moveable ...
Página 12
... extremities in connection with one another . Each of these cells is then also seen to contain a nucleus with nucleolus ( Pl . II , figs . 11 , 12 ) . We have seen that in all the fresh - water genera a portion of the endocyst remains in ...
... extremities in connection with one another . Each of these cells is then also seen to contain a nucleus with nucleolus ( Pl . II , figs . 11 , 12 ) . We have seen that in all the fresh - water genera a portion of the endocyst remains in ...
Página 16
... extremity immediately receives the œsophagus , while by the other it is continuous with the remaining portion of the stomach ; it may be called the cardiac cavity of the stomach . The second division ( g ) forms the greater portion of ...
... extremity immediately receives the œsophagus , while by the other it is continuous with the remaining portion of the stomach ; it may be called the cardiac cavity of the stomach . The second division ( g ) forms the greater portion of ...
Página 17
... extremity , and presents here a well - marked constriction ; in extreme retraction of the polypide it is bent back upon the rest of the stomach . The great cavity ( g ) of the stomach is of a nearly cylindrical figure ; from its upper ...
... extremity , and presents here a well - marked constriction ; in extreme retraction of the polypide it is bent back upon the rest of the stomach . The great cavity ( g ) of the stomach is of a nearly cylindrical figure ; from its upper ...
Página 18
... extremity of this tube . After continuing here for a while in a state of rest , and probably yielding to the absorbent tissues its remaining nutritious elements , portions in the form of roundish pellets 18 DIGESTIVE SYSTEM .
... extremity of this tube . After continuing here for a while in a state of rest , and probably yielding to the absorbent tissues its remaining nutritious elements , portions in the form of roundish pellets 18 DIGESTIVE SYSTEM .
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