A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Página 3
... 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 the name of " Polype à ...
... 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 the name of " Polype à ...
Página 16
... margin is slightly elevated , and is continuous on the neural side , with a hol ow valve - like organ ( e ) of very peculiar formation . This organ arches over the mouth , and may be aptly enough compared in shape to the epiglottis of ...
... margin is slightly elevated , and is continuous on the neural side , with a hol ow valve - like organ ( e ) of very peculiar formation . This organ arches over the mouth , and may be aptly enough compared in shape to the epiglottis of ...
Página 17
... margin , and is totally destitute of the valve - like appendage which , unless Urnatella should prove an exception , is found in all the other fresh - water species . The upper part of the œsophagus ( fig . 3 , f ) is wide , and may ...
... margin , and is totally destitute of the valve - like appendage which , unless Urnatella should prove an exception , is found in all the other fresh - water species . The upper part of the œsophagus ( fig . 3 , f ) is wide , and may ...
Página 19
... 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 neural margin , or that which ...
... 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 neural margin , or that which ...
Página 20
... margin of the cup . e . Mouth . f . Esophagus . g . Stomach . h . Rectum . i . Anus . k . Epistome . 7. Ganglion . m . Generative organ . n . Retractor muscle . o . Lophophore . The tentacula are connected to one another at their base ...
... margin of the cup . e . Mouth . f . Esophagus . g . Stomach . h . Rectum . i . Anus . k . Epistome . 7. Ganglion . m . Generative organ . n . Retractor muscle . o . Lophophore . The tentacula are connected to one another at their base ...
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