A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 6
... Tunicata . It is not easy to say to whom we are indebted for the first absolute withdrawal of the Polyzoa from the Radiate sub - kingdom , and their location among the Mollusca . The obvious justice of the step must have simultaneously ...
... Tunicata . It is not easy to say to whom we are indebted for the first absolute withdrawal of the Polyzoa from the Radiate sub - kingdom , and their location among the Mollusca . The obvious justice of the step must have simultaneously ...
Página 15
... Tunicata , induced me to look for it in the ectocyst of the Polyzoa , but I have never succeeded in obtaining satisfactory evidence of its existence in any of the tissues of the Polyzoa , either fresh - water or marine . I observed ...
... Tunicata , induced me to look for it in the ectocyst of the Polyzoa , but I have never succeeded in obtaining satisfactory evidence of its existence in any of the tissues of the Polyzoa , either fresh - water or marine . I observed ...
Página 43
... Tunicata ; the other , the Mollusca proper , embraced all the other members of the molluscan sub - kingdom . The affinities of the Tunicata and Polyzoa being thus fully recognised , it is of importance to know in what these affinities ...
... Tunicata ; the other , the Mollusca proper , embraced all the other members of the molluscan sub - kingdom . The affinities of the Tunicata and Polyzoa being thus fully recognised , it is of importance to know in what these affinities ...
Página 46
... Tunicata would remain inexplicable , namely the epistome of the phylactolæmatous Polyzoa . Now for the determination of the homological import of this somewhat enigmatical organ , the key is at once afforded by the Tunicata . The ...
... Tunicata would remain inexplicable , namely the epistome of the phylactolæmatous Polyzoa . Now for the determination of the homological import of this somewhat enigmatical organ , the key is at once afforded by the Tunicata . The ...
Página 47
... Tunicata , some in one , and some in another . The pre- dominant importance of the transverse over the longitudinal bars of the branchial apparatus in the Tunicata is sufficiently manifest ; in most cases , they are larger and more ...
... Tunicata , some in one , and some in another . The pre- dominant importance of the transverse over the longitudinal bars of the branchial apparatus in the Tunicata is sufficiently manifest ; in most cases , they are larger and more ...
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