A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 5
He then goes on to compare the walls of the body cavity in Gorgonia , Isis , Alcyonium , & c . , to the tunics of an Ascidian or the mantle of an ordinary Mollusc , a comparison which plainly shows that he had no idea whatever of the ...
He then goes on to compare the walls of the body cavity in Gorgonia , Isis , Alcyonium , & c . , to the tunics of an Ascidian or the mantle of an ordinary Mollusc , a comparison which plainly shows that he had no idea whatever of the ...
Página 8
... Polypary and Polypidome , I have applied the term Cćnćcium.t The cćnćcium is composed almost universally of two perfectly distinct tunics ; to the external I have given the name of Ectocyst , I and to the internal that of Endocyst .
... Polypary and Polypidome , I have applied the term Cćnćcium.t The cćnćcium is composed almost universally of two perfectly distinct tunics ; to the external I have given the name of Ectocyst , I and to the internal that of Endocyst .
Página 13
... the endocyst is the normal condition of this tunic , but from the delicacy of these tubes , and the transparency and want of colour of their contents , they escape detection under ordinary circumstances , and are first revealed only ...
... the endocyst is the normal condition of this tunic , but from the delicacy of these tubes , and the transparency and want of colour of their contents , they escape detection under ordinary circumstances , and are first revealed only ...
Página 14
Lophopus , also , at first sight , conveys the impression of being destitute of an ectocyst , and having the place of this tunic supplied by a peculiar unorganized gelatinoid secretion , in which the colony is enveloped ( Pl . II ...
Lophopus , also , at first sight , conveys the impression of being destitute of an ectocyst , and having the place of this tunic supplied by a peculiar unorganized gelatinoid secretion , in which the colony is enveloped ( Pl . II ...
Página 27
5 , 6 , v ) were mentioned as entering into the composition of this tunic , and taking a transverse direction round the cell . These may be designated by the name of parietal muscles . They may generally be seen very distinctly towards ...
5 , 6 , v ) were mentioned as entering into the composition of this tunic , and taking a transverse direction round the cell . These may be designated by the name of parietal muscles . They may generally be seen very distinctly towards ...
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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
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cćnćcium canal 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 Hist 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 structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young