A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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... and magnified , and I have never omitted to draw the polypide as well as the cœnocium , believing that the latter will by itself convey but a very imperfect idea of the real character of these beautiful little animals .
... and magnified , and I have never omitted to draw the polypide as well as the cœnocium , believing that the latter will by itself convey but a very imperfect idea of the real character of these beautiful little animals .
Página 3
The investigations of Trembley and Baker , however , having clearly demonstrated , in the " Polype à Panache , " all the essential characters of polyzoal structure , must be viewed as marking out another most important epoch in the ...
The investigations of Trembley and Baker , however , having clearly demonstrated , in the " Polype à Panache , " all the essential characters of polyzoal structure , must be viewed as marking out another most important epoch in the ...
Página 4
... to the comparison of external characters for the determination of species , and as the grounds of classification . ... and involved the fundamental error of assuming the external calcareous or horny covering as a character of ...
... to the comparison of external characters for the determination of species , and as the grounds of classification . ... and involved the fundamental error of assuming the external calcareous or horny covering as a character of ...
Página 7
... and if to these characters we add the presence of true sexual organs in the form of ovary and testis occupying some portion of the interior of the sac , and the negative character of the absence of all vestige of a heart , we shall ...
... and if to these characters we add the presence of true sexual organs in the form of ovary and testis occupying some portion of the interior of the sac , and the negative character of the absence of all vestige of a heart , we shall ...
Página 10
... as a morphological fact , tending , as will be afterwards shown , to throw much light on certain homological questions , cannot be employed as the determining character of groups more comprehensive than those of generic rank .
... as a morphological fact , tending , as will be afterwards shown , to throw much light on certain homological questions , cannot be employed as the determining character of groups more comprehensive than those of generic rank .
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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
Información bibliográfica
| Título | A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign Volumen18 de ¬The Ray Society |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
| Largo | 119 páginas |
| Exportar cita | BiBTeX EndNote RefMan |