A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
Dentro del libro
Resultados 1-5 de 67
Página
... the exact limits of the species , some difficulty has been experienced . I have
however , deemed it best to describe as a distinct species every well - marked
variation of form which I could not find connected by intermediate gradations with.
... the exact limits of the species , some difficulty has been experienced . I have
however , deemed it best to describe as a distinct species every well - marked
variation of form which I could not find connected by intermediate gradations with.
Página
which I could not find connected by intermediate gradations with other forms ,
and which could not , with probability , be referred to the accidental influence of
external agencies . It is possible that some of the forms here described as distinct
...
which I could not find connected by intermediate gradations with other forms ,
and which could not , with probability , be referred to the accidental influence of
external agencies . It is possible that some of the forms here described as distinct
...
Página 1
... separated as a distinct group , and described by Thompson under the name of
Polyzoa , and shortly after indicated by Ehrenberg under that of Bryozoa . They
are chiefly inhabitants of the sea , where they may be witnessed under numerous
...
... separated as a distinct group , and described by Thompson under the name of
Polyzoa , and shortly after indicated by Ehrenberg under that of Bryozoa . They
are chiefly inhabitants of the sea , where they may be witnessed under numerous
...
Página 2
1 Historical view of the facts which finally led to the establishment of the Polyzoa
as a distinct class . It was in the last year of the sixteenth century that the
Neapolitan , Ferante Imperato , asserted that corals possessed the nature of
animals .
1 Historical view of the facts which finally led to the establishment of the Polyzoa
as a distinct class . It was in the last year of the sixteenth century that the
Neapolitan , Ferante Imperato , asserted that corals possessed the nature of
animals .
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 ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cænæcium 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 organ orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens represented 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