A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 5
... observations on the marine productions of the coast . These observations had been commenced several years before , and had already resulted in the celebrated discovery of the metamorphosis of the Crustacea ; it was not , however , until ...
... observations on the marine productions of the coast . These observations had been commenced several years before , and had already resulted in the celebrated discovery of the metamorphosis of the Crustacea ; it was not , however , until ...
Página 6
... observations are , therefore , original and independent , and , as he tells us they were made in the summer of 1820 , it would seem that it was only the delay of publication that has deprived him of the honour of being the first to ...
... observations are , therefore , original and independent , and , as he tells us they were made in the summer of 1820 , it would seem that it was only the delay of publication that has deprived him of the honour of being the first to ...
Página 12
... observed is the accumulation round the nucleus of a little mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ...
... observed is the accumulation round the nucleus of a little mass of granular protoplasm . In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ...
Página 13
... observation of the contained parts a matter of considerable difficulty . In some species of Plumatella , and in Alcyonella flabellum and A. Benedeni , the earthy particles are entirely absent , from a longitudinal line which commences ...
... observation of the contained parts a matter of considerable difficulty . In some species of Plumatella , and in Alcyonella flabellum and A. Benedeni , the earthy particles are entirely absent , from a longitudinal line which commences ...
Página 15
... observed , while Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ectocyst of the fresh - water Polyzoa appears in every case to be absolutely structure ...
... observed , while Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ectocyst of the fresh - water Polyzoa appears in every case to be absolutely structure ...
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