A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
Dentro del libro
Resultados 1-3 de 34
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 tissue .
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 tissue .
Página 43
The reader will call to mind that the respiratory chamber of an Ascidian , consists
essentially of a membranous sac , having the inner surface of its walls covered by
two sets of tubular bars , one running longitudinally , or from behind forwards ...
The reader will call to mind that the respiratory chamber of an Ascidian , consists
essentially of a membranous sac , having the inner surface of its walls covered by
two sets of tubular bars , one running longitudinally , or from behind forwards ...
Página 47
... and the gill consists merely of a tubular rod passing obliquely across the
thoracic chamber , and furnished with transverse bands of cilia . It is the
homologue of the “ branchial sinus in Clavelina ; and the mouth , situated at its
posterior and ...
... and the gill consists merely of a tubular rod passing obliquely across the
thoracic chamber , and furnished with transverse bands of cilia . It is the
homologue of the “ branchial sinus in Clavelina ; and the mouth , situated at its
posterior and ...
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 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British canal cavity cell characters cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella crown 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 important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organs 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