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 50
Página 3
... tentacula borne on the margin of a crescent - shaped disc . This beautiful tentacular plume is one of its most striking features ; and as Trembley naturally supposed his animal to be intimately related with the polypes , it suggested ...
... tentacula borne on the margin of a crescent - shaped disc . This beautiful tentacular plume is one of its most striking features ; and as Trembley naturally supposed his animal to be intimately related with the polypes , it suggested ...
Página 7
... tentacula , and to have a single nervous ganglion situated on one side of the oesophagus . Let us now suppose this canal to be bent back upon itself towards the side of the ganglion so as to approximate the termination to the origin ...
... tentacula , and to have a single nervous ganglion situated on one side of the oesophagus . Let us now suppose this canal to be bent back upon itself towards the side of the ganglion so as to approximate the termination to the origin ...
Página 8
... tentacula , ganglion , muscles , generative organs , circumambient fluid , and investing sacs , repeating itself by gemmation , and thus producing one or more precisely similar systems holding a definite position relatively to one ...
... tentacula , ganglion , muscles , generative organs , circumambient fluid , and investing sacs , repeating itself by gemmation , and thus producing one or more precisely similar systems holding a definite position relatively to one ...
Página 12
... tentacular crown . This thin , non - contractile portion of the endocyst constitutes the tentacular sheath which encloses and protects the tentacula during the retracted state of the polypide . Near the spot where the endocyst passes ...
... tentacular crown . This thin , non - contractile portion of the endocyst constitutes the tentacular sheath which encloses and protects the tentacula during the retracted state of the polypide . Near the spot where the endocyst passes ...
Página 19
... tentacula ( 1 ) which are borne upon the margin of the lophophore . The lophophore is throughout almost the entire class of an orbicular figure ; but in the fresh - water genera Cristatella , Lophopus , Plumatella , and Alcyonella , its ...
... tentacula ( 1 ) which are borne upon the margin of the lophophore . The lophophore is throughout almost the entire class of an orbicular figure ; but in the fresh - water genera Cristatella , Lophopus , Plumatella , and Alcyonella , its ...
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