A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 42
... latter as the second sexual or male zooid ; but the testis may perhaps be more correctly considered , like the ovary , as a distinct sexual bud , having the generative system so enor- mously predominant as to overrule and replace all ...
... latter as the second sexual or male zooid ; but the testis may perhaps be more correctly considered , like the ovary , as a distinct sexual bud , having the generative system so enor- mously predominant as to overrule and replace all ...
Página 51
... latter are produced into long ciliated tentacles ; and the result will be a Polyzoon , which needs only the power of gemmation to give rise to those composite aggregations which are so characteristic of the group . " + In these words we ...
... latter are produced into long ciliated tentacles ; and the result will be a Polyzoon , which needs only the power of gemmation to give rise to those composite aggregations which are so characteristic of the group . " + In these words we ...
Página 52
... latter at first double , but after- wards single by coalescence ) . The branchial stigmata subsequently increase in number , the branchial sac at the same time detaching itself more and more from the walls of the thoracic chamber ...
... latter at first double , but after- wards single by coalescence ) . The branchial stigmata subsequently increase in number , the branchial sac at the same time detaching itself more and more from the walls of the thoracic chamber ...
Página 54
... latter in the Molluscoida . To this view , however , I have not been able to assent . Notwithstanding the obvious affinities just referred to between the Brachiopoda and the Polyzoa , I yet believe that the Brachiopoda are much more ...
... latter in the Molluscoida . To this view , however , I have not been able to assent . Notwithstanding the obvious affinities just referred to between the Brachiopoda and the Polyzoa , I yet believe that the Brachiopoda are much more ...
Página 57
... latter , as the caddis worm is of his case , but that each is an inseparable part of one and the same animal . He witnessed also the circulation of the fluid in the perigastric space . This circulation was rendered evident by the ...
... latter , as the caddis worm is of his case , but that each is an inseparable part of one and the same animal . He witnessed also the circulation of the fluid in the perigastric space . This circulation was rendered evident by 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