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 33
Página 11
... membranes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft ... membrane , we find it composed of large irregularly shaped cells , widely separated from each other by an ...
... membranes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft ... membrane , we find it composed of large irregularly shaped cells , widely separated from each other by an ...
Página 13
... membrane , but were contained in the interior of a system of tubes which formed a network in the substance of the endocyst ( Pl . II , fig . 13 ) . They are about theth of an inch in the longer diameter , larger at one end than at the ...
... membrane , but were contained in the interior of a system of tubes which formed a network in the substance of the endocyst ( Pl . II , fig . 13 ) . They are about theth of an inch in the longer diameter , larger at one end than at the ...
Página 14
... membrane , free from earthy deposit , and of a deep brown colour . Towards the orifice of the cell it becomes thin and delicate , and is here strengthened by four longitudinal horny ribs ( Pl . X , fig . 3 , b ′′ ) . The part of the ...
... membrane , free from earthy deposit , and of a deep brown colour . Towards the orifice of the cell it becomes thin and delicate , and is here strengthened by four longitudinal horny ribs ( Pl . X , fig . 3 , b ′′ ) . The part of the ...
Página 17
... membrane ( Pl . III , fig . 7 , μ ) ; it possesses also an undoubted cellular structure ; it admits of being traced uninterruptedly over the whole tract of the alimentary canal , and , on the application of acetic acid , becomes ...
... membrane ( Pl . III , fig . 7 , μ ) ; it possesses also an undoubted cellular structure ; it admits of being traced uninterruptedly over the whole tract of the alimentary canal , and , on the application of acetic acid , becomes ...
Página 20
... membrane which adheres to their back , extending forwards for about one third of their length , and constituting a cup . This membrane passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus ...
... membrane which adheres to their back , extending forwards for about one third of their length , and constituting a cup . This membrane passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus ...
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