A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
Dentro del libro
Resultados 1-5 de 29
Página 11
The cœnocium , in every case , except in Cristatella , is composed of two distinct membranes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft , transparent , and contractile ...
The cœnocium , in every case , except in Cristatella , is composed of two distinct membranes , which must be carefully distinguished from one another - an internal , the endocyst , which is always soft , transparent , and contractile ...
Página 12
In Paludicella , whose transparent ectocyst admits of a distinct view of all the contained parts , the fibres are collected into numerous transverse bands ( Pl . X , figs . 3 , 4 , v ) , which we may trace throughout the whole extent of ...
In Paludicella , whose transparent ectocyst admits of a distinct view of all the contained parts , the fibres are collected into numerous transverse bands ( Pl . X , figs . 3 , 4 , v ) , which we may trace throughout the whole extent of ...
Página 13
The perfectly transparent wide origin of this line . gives to the orifice of the cell the appearance of having a deep notch on one side . In Fredericella a slightly prominent keel is also apparent , but the notch - like transparent ...
The perfectly transparent wide origin of this line . gives to the orifice of the cell the appearance of having a deep notch on one side . In Fredericella a slightly prominent keel is also apparent , but the notch - like transparent ...
Página 14
This gelatinous - looking investment is , however , a true ectocyst ; it consists of a membranous tunic of great delicacy , apparently enclosing a perfectly transparent and colourless fluid , probably in the meshes of a sort of areolar ...
This gelatinous - looking investment is , however , a true ectocyst ; it consists of a membranous tunic of great delicacy , apparently enclosing a perfectly transparent and colourless fluid , probably in the meshes of a sort of areolar ...
Página 16
... the walls which are turned towards the mouth are thick , and densely clothed on their external surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia .
... the walls which are turned towards the mouth are thick , and densely clothed on their external surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia .
Comentarios de la gente - Escribir un comentario
No encontramos ningún comentario en los lugares habituales.
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