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 37
... Statoblasts . From the earliest period that the fresh - water Polyzoa became an object of study , the statoblasts attracted the attention of observers . Their form is not exactly the same in the different species , but they may be ...
... Statoblasts . From the earliest period that the fresh - water Polyzoa became an object of study , the statoblasts attracted the attention of observers . Their form is not exactly the same in the different species , but they may be ...
Página 38
... statoblasts were produced ( Pl . XI , figs . 42 , 43 ) . The statoblasts have been always viewed and described as the eggs of the polyzoon in whose cell they occur , a very natural mistake , and one the more excusable as the true ovary ...
... statoblasts were produced ( Pl . XI , figs . 42 , 43 ) . The statoblasts have been always viewed and described as the eggs of the polyzoon in whose cell they occur , a very natural mistake , and one the more excusable as the true ovary ...
Página 39
... statoblast presents itself as the elegant little spiny lenticular body ( fig . 6 ) so characteristic of the genus Cristatella . I have sought in vain , in all the fresh - water Polyzoa , for some orifice through which the statoblasts or ...
... statoblast presents itself as the elegant little spiny lenticular body ( fig . 6 ) so characteristic of the genus Cristatella . I have sought in vain , in all the fresh - water Polyzoa , for some orifice through which the statoblasts or ...
Página 40
... statoblasts , another kind which is characterised by some peculiarities . In both these Polyzoa the cells may be observed towards the end of summer loaded with statoblasts which lie loose within them . These are the ordinary ones , and ...
... statoblasts , another kind which is characterised by some peculiarities . In both these Polyzoa the cells may be observed towards the end of summer loaded with statoblasts which lie loose within them . These are the ordinary ones , and ...
Página 41
... statoblasts of the Polyzoa is singularly striking ; but , with the very different origin of the two sets of bodies , we must take care not to attribute a greater share of significance to this resemblance than it really deserves . † The ...
... statoblasts of the Polyzoa is singularly striking ; but , with the very different origin of the two sets of bodies , we must take care not to attribute a greater share of significance to this resemblance than it really deserves . † The ...
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 cœnocium crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst 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 lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed œsophagus 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 Zoophytes