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 31
... Organs of the Life of Relation . I have succeeded in making out a distinct nervous system in all the genera with the exception of Urnatella and Pectinatella , which I have had no opportunity of examining , and of Paludicella , in which ...
... Organs of the Life of Relation . I have succeeded in making out a distinct nervous system in all the genera with the exception of Urnatella and Pectinatella , which I have had no opportunity of examining , and of Paludicella , in which ...
Página 32
... organs have now been satisfactorily demonstrated in several of the genera of Polyzoa , both fresh - water and marine ... organ , it was loaded with ova of various sizes , some so small as to require for their detection considerable ...
... organs have now been satisfactorily demonstrated in several of the genera of Polyzoa , both fresh - water and marine ... organ , it was loaded with ova of various sizes , some so small as to require for their detection considerable ...
Página 41
... involuntarily reminded of the development of the chains of salpa - buds from the stolon of the solitary salpæ . much more highly differentiated structure , in which the organs 6 ALTERNATION OF GENERATIONS . 41 He ...
... involuntarily reminded of the development of the chains of salpa - buds from the stolon of the solitary salpæ . much more highly differentiated structure , in which the organs 6 ALTERNATION OF GENERATIONS . 41 He ...
Página 42
... organs of digestion especially hold a dominant position , and which we may regard as sexual or non - sexual , according to the view we take of the relation between it and the testis , as will presently be seen . Now , if the formation ...
... organs of digestion especially hold a dominant position , and which we may regard as sexual or non - sexual , according to the view we take of the relation between it and the testis , as will presently be seen . Now , if the formation ...
Página 43
... organs in the two groups . I had elsewhere * attempted to show what I believed to be the correct view of the relation between the Tunicata and the Polyzoa . Additional opportunities of investigation have suggested a few modifications ...
... organs in the two groups . I had elsewhere * attempted to show what I believed to be the correct view of the relation between the Tunicata and the Polyzoa . Additional opportunities of investigation have suggested a few modifications ...
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 Alcyonella Alcyonella fungosa Alcyonella stagnorum alimentary canal Allman anatomy animal annulus Ascidian attached become Beneden Bowerbankia Brachiopoda branches branchial sac Brit Brux campanulata cavity cell cilia crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi embryo endocyst epistome exserted external fibres flabellum fluid fresh-water Polyzoa funiculus ganglion genera genus Gervais hæmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnæus longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus organ orifice Original figures ovary ovum Paludicella parieto-vaginal muscles peculiar Pedicellina perigastric space Plumatella repens Polype à Panache polypide Polyzoon portion posterior present Raspail respiratory retraction retractor retractor muscles Rösel seen septa side species specimens statoblasts stomach structure surface tentacles tentacula tentacular crown tentacular sheath thoracic chamber transparent transverse Trembley tubes Tubularia repens tunic Tunicata Urnatella walls Zooph